Merge tag '0.5.0' into develop

0.5.0
Merge tag '0.5.1' into develop

Hotfix 0.5.1
Versioning file is now a lowercased dotfile; it's package metadata
Cleanup git ignore rules
Change PHP version 5.6.0 -> 5.6; includes patches
:memo: Omit repetition
:memo: Add list of php extensions included for completions
:memo: Merge Sublime Text docs comment with the one in the usage section
:memo:
Merge branch 'develop'
:memo: add list of other packages and some edits
Merge branch 'develop'

* develop:
  :memo: add list of other packages and some edits