This storage will transparently compress getAttachment/putAttachment results.
Only text, json, xml mme type are compressed.

Thanks to Lucas Parsy.

Synchronisation status is based on document signature (sha) comparison.
Signature are stored each time a document is successfully synchronised.

Conflict are detected but reported as an error for now, as no solve process is implemented.

This is a work in progress commit and all storages are broken.

* Use as much as possible RSVP promise to simplify the code.
* simplify error management: use Error class in case of problem.
* Drop the job management at that point. Such functionnality could be reimplemented as a storage.
* Start to simplify the tests, to speed up debugging.
* Drop requireJS usage, as the goal for now is to make it usage on browser.
* allDocs has to be rewritten to ease storage tree capacity checking. A storage should only implement what it could really do.
* disable attachment management for now.

http://semver.org

http://semver.org