* Stuff
** DONE group_by default function
** DONE group_by_count
** DONE group_by_array
** DONE Remove special subs
**** DONE docs
** DONE Fix throw, remove lib
** DONE Release
** DONE Deprecate Array::Transform, point to new
** map_by, grep_by, group_by hash key lookup
*** if first item is ref HASH
** grep_by - value
** group (group_count)
*** group_array
*** group_element
** find(sub), like grep
** find_by($method, $args, $value), like grep_by but first
** contains value
** compact - without undefined
** compactTrue - without false
** without - grep -v value
* Hash
** map_values
** map_values_by() maps values from one thing to another
