Merge pull request #933 from bronze1man/pr-test1

fix 5 ignored failed test cases
Added a nil type to the type system.

Marked a bunch of code pieces for review.
Disabled failing test (temporarely)
Fixed failing test because of isNil().
Remove unused tokens
Add feedback submission facility to the plugin
FIX NPE in settings
Improve completion test cases
Use AppEngine proxy app to submit bugs to Github
Merge pull request #936 from dlsniper/fix-tests

Remove unused tokens
Merge pull request #937 from dlsniper/fix-921

FIX NPE in settings (fixes #921)
Merge pull request #938 from dlsniper/improved-completion-tests

Improve completion test cases
Merge pull request #909 from dlsniper/send-feedback

Send feedback on crashes via Github API
fix all failed and ignore test cases in ImportUnusedInspectionTest.
Solved two relative import tests.
Merge pull request #943 from bronze1man/pr-import-unused

fix all failed and ignore test cases in ImportUnusedInspectionTest.
Fixed cgo test.
Fixed testIota test.
find redeclare error in function parameters and body.
remove FunctionDuplicateArgumentInspection and FunctionRedeclareParameterInResultInspection which had been done in RedeclareInspecion