Folder and Search Folder objects now expose a pair of iterators to
view all of the contacts in them. The contact object exposes a number
of helper methods for common properties (including contact photos)
The makefile now attempts to detect both the compiler and OS, and
does the right things depending on that combination.
Setting USE_GPP in the shell will force g++ on windows
Setting CPP11 in the shell will enable c++0x mode in g++