Removed getAll

Warning: BREAKING CHANGE!

We've removed the getAll method, so we can avoid a redis full table scan.

Added: Get All from subscriber

Warning: BREAKING CHANGE!
onDataFn signature has changed, now is onDataFn(err, value)

v2.0.5: Merge pull request #13 from Artear/change_version

Changed: version code;

v2.0.4: Merge pull request #11 from Artear/fix_subscriptor_data

Subscriptor fix

v2.0.3: Merge pull request #10 from Artear/expose_logger

Exposed logger

v2.0.2: Merge pull request #8 from Artear/default_keep_alive_time

Changed: keep alive default time;

v2.0.1: Merge pull request #7 from Artear/changed_doc

Changed: doc;