Refactor error message for argument mismatch to be more generic

Previously an insufficient amount of arguments to e.g. the 'type' utility resulted in a "Too many arguments" feedback, which can be somewhat confusing. Now if the argument count does not match, a more generic error message is shown.
Revert "Fix tests for Cabal <= 1.16"

The problem the reverted commit tried to fix seems to have been just a
symptom of another root cause that was later fixed as the problem does
not seem to occur anymore even without this changeset also this
changeset broke cabal sandboxes with ghc < 7.8.

Fix #262

This reverts commit 8741323f5b9c5450c40205d0632f61a4b7e42125.

Conflicts:
	Language/Haskell/GhcMod/GhcPkg.hs
Add test for sandbox compatibility with ghc < 7.8
Merge pull request #263 from DanielG/dev-fix-262

Revert "Fix tests for Cabal <= 1.16"
Merge pull request #261 from saminiir/master

Refactor error message for argument mismatch to be more generic
readme.
readme.
readme.
hcar review.
Add script to collect debugging information.
Merge pull request #267 from DanielG/dev-debug-info

Add script to collect debugging information.
Initial implementation of case splitting
- It doesn't handle vars correctly yet
Work on case split variable naming
Fix problems with GHC's Typed Holes
Add special cases for case splitting
Merge pull request #270 from serras/fix-typed-holes

Fix problems with GHC's Typed Holes
Merge branch 'fix-typed-holes'
Initial support for adding body from signature
Merge remote-tracking branch 'kazu/master'
Initial implementation of instance completion