Update getAdress to getAddress, fixes compile errors in 2 examples

Here's another minor fix.  Sorry, this pull request also touches CmdMessenger.cpp which you've already modified, so this probably can't merge automatically.  I didn't realize that until just now, after pushing it up to github.  Forgot this is 1 repository for multiple libraries.

Anyway, the fix is simple, just replace ever "getAdress" with "getAddress".

Discussion here....

http://forum.pjrc.com/threads/24589-Another-library-fails-to-compile%E2%80%A6-any-ideas-why?p=38033&viewfull=1#post38033