resolved warning pertaining to UIActivityIndicator, fixed up how the JSON received from websequencediagrams.com is processed, removed unnecessary string declarations
Merge remote-tracking branch 'SequenceDiagram/master'
merged, fixed, tested
Merge remote-tracking branch 'SequenceDiagram/Nick'
Wednesday, March 13th, 2013, at 4:28 P.M:

1. Add "caller" argument to sendInvocation function