Merge pull request #98 from pwschmidt/master

MOBSDK-516/527
MOBILE-459 and MOBSDK-379. CMISLog level is now synced with and changes to the AlfrescoLog level, cleaned up more log statements and also enabled metadata extraction in the SDK samples app.
Merge pull request #99 from gavincornwell/master

MOBILE-459 and MOBSDK-379
CMIS error mapping moved to AlfrescoCMISUtil (MOBSDK-526), MOBSDK-527 fixed
Merge branch 'master' of https://github.com/Alfresco/alfresco-ios-sdk