changed markdown formatting
fixed a few documentation issues
updated .gitignore
removed empty examples
make audio files play again
updated README with google group info
changed wording of mailing list
Merge pull request #70 from woutervroege/carddav-mongo

Carddav mongo
 a bit of refactoring
insert new data by default
default is redis.
Merge pull request #71 from mikedeboer/mongo_adjust

...a bit of refactoring for mongodb
Initial checkin of CORS functionality for jsDAV
Object.freeze() not necessary for jsDAV, so removed it. Added basePath to objectTree for backwards-compat and fixed path handling in browser plugin
bump version to 0.3.1
Merge branch 'master' into cors
Changes per Mike's comments
Merge pull request #73 from bedney/cors

CORS functionality for jsDAV
Fixed multiple inheritance limits, fixes #76
Some dependencies were falsely listed NOT optional. Fixes #77