Merge pull request #8 from nshelly/master

Merge with new directory structure (swig-r and swig-sw)
Merge pull request #9 from nshelly/master

Fixed submodules for snapr.
Added Dmitriy's fix for compilation under llvm-g++
Merge pull request #10 from nshelly/master

Added TNEAGraph file.
improved swig-r/Makefile for compile to work on Cygwin - 'import snap' does not work yet
Merge branch 'master' of github.com:snap-stanford/snap-python
Added convert graph function, basic unit tests.
Added snappy file for user-friendly functions.