[Bugid: 18579] Added support for the Profile Extensions Table

[Bugid: 19131] MAX_MEMBERS checking enabled for save profile extension and supplemental table.
[Bugid: 19131] Tests for TooManyMembersError
Typo fix
Merge pull request #6 from animoto/srivenu/18579-push

[Bugid: 18579] Added support for the Profile Extensions Table