Added base graph files, and excluded in gitignore.
Updated base graph files for Linux and make test only run on Linux.
Merge pull request #8 from roks/master

faster TSsParser, additional minor edits
changed "///////" to "//#/////" to improve doxygen output, removed redundant blank lines
Merge branch 'master' of github.com:snap-stanford/snap

Conflicts:
	snap-core/network.h
Added test to compare DOT files (Jure's suggestion.
Added test to compare DOT files (Jure's suggestion).
Merge branch 'master' of github.com:nshelly/snap
Merge branch 'master' of git://github.com/snap-stanford/snap
Fixed a bug in TVec::NextPerm()
Updated comments in agmfast.h/.cpp
More changes to the comments in agm*.h/.cpp files
More changes to the comments to the AGM examples
Added documentation for TSsParser
Merge branch 'master' of git://github.com/snap-stanford/snap
added a test for IsTree(), added a test for a single node graph to IsTree()
Merge pull request #9 from nshelly/master

Updated GraphViz for Linux and Mac graph tests.
fixed compile errors in agmfast.cpp, fixed test errors in test-gviz.cpp
minor updates in the documentation for ss.h
added Mac OS X support to Makefile for doxygen