* changed most of the function signatures to use a pointer to Whisper
  instead of the struct
* added a Close() method to Whisper
Merge pull request #1 from crankycoder/master

fixes some pointers and adds Close()
Merge branch 'master' of https://github.com/kisielk/whisper-go

Conflicts:
	whisper/whisper.go
Fix the offset bug when creating a new whisper db from whisper-go.
Merge pull request #2 from adieu/master

Fix the offset bug when creating a new whisper db from whisper-go.
Merge https://github.com/kisielk/whisper-go

Conflicts:
	whisper/whisper.go
Merge pull request #4 from rafrombrc/master

Fixes certain instances of database corruption