Added package checking

Checks if the first file parsed a package and the functions searched is
a selector expression
Import ident rename case one way

Can handle find even when the import has been renamed.
TODO Make two way
Import ident rename reverse complete

Now checks the import ident rename of current go file and remaps it to
the correct selector when done
Fix func declaration search in pkg
Fixed check search
Added jumpTo result shortcut

In "Find Results" view double clicking or using ctrl+enter will jump to
the file of the current result
Merged FindinFilesgoto
Refactor goFindCallers.go