1.19.0 2015-11-20
       - Update base version to TCPDF 5.2.000.
       - IMPORTANT: Support for font subsetting was added by default to reduce the size of documents using large unicode font files.
           If you embed the whole font in the PDF, the person on the other end can make changes to it even if he didn't have your font.
           If you subset the font, file size of the PDF will be smaller but the person who receives your PDF would need to have your same font in order to make changes to your PDF.
       - The signature of the SetFont() and AddFont() methods were changed to include the font subsetting option (subsetting is applied by default).
       - html anchors support. (by Oleg German)
       - Test framework is changed to test-unit.
           This particular error will occur when the test suite is run from outside a Rails environment.
           Support the test suite is run from outside a Rails environment.
       - Fonts file was separated in rbpdf-font.gem.

1.18.7 2015-10-18
       - Fixed case of missing HTML <pre> tag texts with whitespace. (use htmlentities gem liblary.)
       - Fixed HTML Image function y position problem with png alpha image.

1.18.6 2015-06-20
       - Fixed page boxes problem for iOS.
       - The dependence to the Rails environment was reduced.
       - Fixed Image tag's style attribute width/height parameter problem.
       - Open angled bracket '<' by HTML sanitize bug fixed.

1.18.5 2015-01-24
       - Rails 4.2 and Ruby 2.2 supported.
       - Fix Rails 4.2 (new HTML sanitizer) compatible.
       - Method getHTMLUnitToUnits() and SetDisplayMode() was fixed, and the problem when dividing, by an integer was fixed. 
       - Remove Rails 4.2 deprecated ::ActionView::Base.sanitized_allowed_css_properties=.
       - Fixed no left padding problem on tables.
       - Fixed thead tag position problem on page break.
       - fix case of missing HTML image (without height attribute) file. 

1.18.4 2014-12-21
       - utf8Bidi() Persion 0x200C(8204) and endedletter bug fixed.
       - utf8Bidi() Bidirectional Algorithm X9/I1 rule BN(ZERO WIDTH NON-JOINER) bug fixed.
       - utf8Bidi() Bidirectional Algorithm N1/N2 rule B/S/WS/ON bug fixed.
       - utf8Bidi() Bidirectional Algorithm W2/W7 rule bug fixed.
       - utf8Bidi() Bidirectional Algorithm N1/N2 rule multiple NIs bug fixed.
       - RTL direction problem fixed. isRTLTextDir direction bug fixed.
       - utf8Bidi() speed was improved.

1.18.3 2014-12-06
       - fixed img and hr self html tag DOM problem.
       - fixed HTML table problem in writeHTMLCell function.
       - fixed the problem which is not separated when table tag continues.
       - fixed the problem that CSS classes don't work in thead table section.
       - HTML image margin was fixed so that a picture in the HTML table didn't overwrite a boundary line.
       - Method Write() was fixed to handle arabic strings.
       - Parameter of the method was changed fixed.
       - getPageDimensions, getBreakMargin, GetBreakMargin, startPageGroup methods fixed.
       - LICENSE.TXT file added.

1.18.2 2014-10-25 
       - getNumLines and a getStringHeight function fixed the problem which is wrong by the case of two or more lines.
       - fix case of missing image file.

1.18.1 2014-09-15 
       - ImagePngAlpha function fixed for the error case where an alpha channel cannot be deleted.
       - getimagesize function fixed for MAC OS rmagick.
       - getimagesize function fixed for grayscale JPEG Image.
       - 16-bit PNG with alpha channel image support improved. (use RMagick liblary)

1.18.0 2014-08-16 
       - rfpdf product name and TCPDF class name changed to RBPDF.
       - ImagePngAlpha function added.

1.17.4 2014-07-28
       - getNumLines, getStringHeight, getMargins function added.
       - fix large image file page break bug.

1.17.3 2014-07-16 Several bug fixed.

1.17.2 2014-07-09 FreeSerif font added from GNU FreeFont(20080912).

1.17   2014-05-18 Update base version to TCPDF 5.1.002. Ruby 2.0/2.1 support. FPDF is deprecated.

1.16   2012-09-08 Rails 3.* and Ruby 1.9.* support, and fix FPDF severral bug.
       Jun NAITOH took over development of RFPDF from Edwin Moss.

1.15   2009-11-20 Rails 2.* support - Thanks to Prawnto plugin for showing the way to the new TemplateHandler

1.14   2006-09-26
       * Added support for @options_for_rfpdf hash for configuration:
       * Added :filename option in this hash
       If you're using the same settings for @options_for_rfpdf often, you might want to 
       put your assignment in a before_filter (perhaps overriding :filename, etc in your actions).

1.13   Updated to fpdf.rb 1.53d.
       Added makefont and fpdf_eps.
       Handle \n at the beginning of a string in MultiCell.
       Tried to fix clipping issue in MultiCell - still needs some work.

1.12   Added Korean support
1.11   Added Japanese support
1.10   Added Chinese support
1.00   Added view template functionality

