Added idea folders to .gitignore

Add the folders generated by the sbt-idea plugin to .gitignore
Merge pull request #702 from benjaminjackman/patch-1

Added idea folders to .gitignore
Fix #704: Fix CLI assembly script to support Milestone and RC releases
Merge pull request #705 from gzm0/fix-cli-version-detect

Fix #704: Fix CLI assembly script to support Milestone and RC releases
Remove the obsolete compiler option noSourceMap.
Update RuntimeString.scala

fix typo in offest => offset
Merge pull request #710 from benjaminjackman/patch-2

Fix typo in RuntimeString.scala
Fix #708: Compiler crash with Dynamic.newInstance with :_*.
Fix #709: String.codePointAt does not handle surrogate pairs.
Merge pull request #707 from sjrd/remove-nosourcemap-option

Remove the obsolete compiler option noSourceMap.
Merge pull request #714 from sjrd/fix-dynnew-varargs

Fix #708: Compiler crash with Dynamic.newInstance with :_*.
Merge pull request #715 from sjrd/fix-string-codepointat

Fix #709: String.codePointAt does not handle surrogate pairs.