Merge pull request #14 from Pita/develop

Contributing guidelines and introduction of develop branch
Merge pull request #15 from Pita/develop

link to license
Merge pull request #16 from Pita/develop

Couch DB support
Bump version #, kinda lazy but at least it 

allows peter to do a:
git pull
npm publish
:|
use utf8 instead of latin
include supported databases in readme
Update README.md
Update README.md
Merge pull request #17 from Pita/fixes/utf8

use utf8 instead of latin
Initial implementation for findKeys
Tested mysql, dirty and mongodb with the findKeys function.
Not yet tested and/or implemented: couch, leveldb, postgres, redis and
sqlite.
Code cleanup and minor bugfixes.
Merge pull request #18 from spcsser/feature/findKeys

findKeys functionality