Fix NPE when IDEA is closing and the action is invoked for the unsaved file
Use the correct Go AppEngine executable
Remove unused assigns
Remove constant values in conditions and fix potential NPEs
Remove unused imports
add test cases with method from another package
Merge pull request #996 from dlsniper/fix-npe-disposal

Fix NPE when IDEA is closing and the action is invoked for the unsaved file
Merge pull request #998 from dlsniper/fix-906

Code cleanup [fixes #906]
Merge pull request #997 from dlsniper/fix-925

Use the correct Go AppEngine executable [fixes #925]
Merge pull request #994 from bronze1man/pr-MethodFromAnotherPackage

add test cases with method from another package
Removed unused code GoPsiType.isIdentical()
FunctionCallInspection refactor and cleanups.
Rebase solving conflicts.
Fixed two tests, marked rest as ignored due to work in progress.