Merge pull request #263 from gavincornwell/master

MOBILE-2492: Spinning forever trying to load task attachment
Changed references from [self class] to static strings that otherwise cause NSCoder warnings for subclasses.
Fixed an exception message along the same lines.
Merge pull request #264 from mikeh/master

Replace some [self class] refs
Ensure correct session creation for Community Edition repositories
Merge pull request #265 from mikeh/master

Ensure correct session creation for Community Edition repositories
MOBSDK-646: Add helper properties to AlfrescoActivityEntry class to aid decoding
MOBSDK-704: Parallel content downloads can overwrite each others local files
Turn down the verbosity on some rendition-based logging
Unit Test fixes: Order of types in objectTypeId is no longer determinable. Compiler warnings for NSInteger to string conversion.
MOBSDK-646: Renamed internal methods to reflect naming changes elsewhere. Fixed property overwriting issue.
MOBSDK-704: Follow-up fix to temp file name generator. Moved internal NodeRef prefix constant around.
Merge pull request #266 from mikeh/master

MOBSDK-646, MOBSDK-704, unit test fixes
MOBSDK-705:  Multiple-tenant handling code is incorrect
Merge pull request #267 from msaeedi/master

MOBSDK-705
MOBSDK-706: CMIS error codes are not mapped to Alfresco error codes
Merge pull request #268 from tmughal/master

MOBSDK-706
MOBSDK-707: Make OAuth login dialog more mobile-friendly
Merge pull request #269 from mikeh/master

MOBSDK-707