* [ADDED] getUserMiningStats to fetch all speed related data
* Uses global cache if available, falls back to local query and then
local caches
* [REMOVED] getUserHashrate, getUserSharerate, getUserAvgShareDifficulty
* [UPDATED] All code occurences for the above to use the new system
Probably won't change much since global cache was already used but does
help on the Dashboard since we combine at least 2 calls into one.
* [FEATURE] Allow in-class checking for user permissions
* [FEATURE] Allow in-class creation of the JSON data for coherence
* [FEATURE} Added API version in JSON data for client side checks
* [IMPROVEMENT] Adjusted all API calls to use the new JSON layout
**NOTE**: This is breaking backwads compatibility with the old API!
Please adjust your client application to support this new version.
The data array should not change much more other than added features.
