SW-78. Create Sphinx doc for openvisualizer directory tree.

SConstruct -- Added 'docs' goal
docs -------- Added directory with documentation templates

Also fixed up some source comments so documentation builds cleanly.
Still emits one warning related to OS-specific output.
ADM-39. Add Sphinx source documentation to Travis CI build.
Merge pull request #41 from kb2ma/develop_ADM-39b

ADM-39. Add Sphinx source documentation to Travis CI build.