Fix checker module docstring

It's checking by word now, no character-wise check
Add initial (dummy) corrector script/server
Add database schema
Add simple README/specs outline
Add import_lexicon script
Add detail to readme

Letters are forced to lowercase
Initial corrector implementation
Add modified editdist() costs
Add handling for fail cases in corrector
Add (unusable) unit test for corrector
Add Corrector

Merge branch 'develop'

Add various stuffs.
Add dynamic cost to editdist().
Fix stuffs.

Conflicts:
	gzspell/src/gzspell/corrector.py