Update as Xcode4 support removal
Merge branch 'develop'

* develop:
  Mention xvimrc in readme
Fix typo in readme 'proccess' -> 'process'
Merge pull request #585 from udit99/master

Fix typo in readme 'proccess' -> 'process'
Fix crash when 'Jump to Definition" is jumping to system component.
The root cause of the crash was that when jumping to source file in system component the text storage class of the view is temporalily nil. The code expected that all the view have its text storage...