Merge pull request #131 from pwschmidt/master

MOBSDK-482 (Part I)
Merge pull request #132 from pwschmidt/master

MOBSDK-482 (Part II)
Remove private methods from AlfrescoContent and remove modification of query statements in SearchService.
Merge pull request #133 from gavincornwell/master

Remove private methods from AlfrescoContent and remove modification of query statements in SearchService
Another attempt at improving the AlfrescoContentFile initialisers.
Merge pull request #134 from gavincornwell/master

Another attempt at improving the AlfrescoContentFile initialisers.
modified most unit tests to take in file/folder names with randomised strings to avoid collisions. The names are defined in the BaseTest class.