[TIDOC-1045] Documentation updates.  Add links and info specific to 3.1.0.
[TIDOC-1011] Clarify iOS 6 login and 3.1 release info
[TIDOC-1011] Update doc links
[TIDOC-1011] Reword some items
Merge pull request #88 from bhatfield/tidoc-1011

[TIDOC-1011] Clarify iOS 6 login and 3.1 release info, and update doc links
Merge pull request #87 from bhatfield/tidoc-1045

[TIDOC-1045] Documentation updates.  Add links and info specific to 3.1.0.