Merge pull request #20 from jlothian/master

Change classnames, update and re-enable gtest unit testing, fix documentation generation via doxygen in Makefiles.  Fixes several make dependency issues and other small bugs.
Merge pull request #21 from jlothian/819da3520d2b650f51f1921876125f1e280d7b1f

Simplify I/O
adding expansion
add reasonable help output and -h option to graph_stats
Merge branch 'master' of github.com:jlothian/INDDGO-survey
adding parallelism to loops in eccentricity, ecc_dist and expansion
adding expansion to test
Merge remote branch 'upstream/master'
Merge pull request #25 from spowers/master

Adding parallelism to eccentricity, ecc_dist and expansion
Fix up macros so that C++11 compilers can use them.
Fix parmetis library link commands in Makefiles
Merge branches 'gcc47' and 'parmetis_make'
Merge pull request #26 from MattBBaker/master

Parallel build fixups and compiler fixup
Adding new gconvert utility for conversions between file types; removing old X2Y utilities
Merge branch 'master' of github.com:jlothian/INDDGO-survey
Merge pull request #25 from jlothian/master

Adding recent feature work and bugfixes, support for OpenMP
Adding a #define for INDDGO_INFINITY (used in shortest path calcs)
Adding avg shortest path length calculation; updating djikstra stuff to use  INDDGO_INFINITY
Adding avg_path_length to graph_stats driver
cleaning up code