Update CONTRIBUTING.md
Merge pull request #510 from smolcoder/master

Inspection of already exported functions.
type parsing simplification
regen with short names
fix #505: Invalid syntax check in erl file with define with name _
fix #505: proper rename for macros and underscores
one more regen, hopefully we find useScope as well
link for a proper version of GK
#505: add a test for rename of underscore macro
#512: verbose logging for debugger
#514: rework Erlang/OTP version detection
#518: detect sdk version in small ides, rename 'R17' to '17'
drop a separate element type for underscore - use var instead
#499: disable inspections in macro call arguments
drop useless code: ErlangPsiImplUtil.isMacros was always 'false'
#499: show errors and warnings in macro call arguments with lower severity
update apache.xml
use setEnabledAndVisible
use command
use setEnabledAndVisible