this Reverts to before the c_api_docs were added which caused massive problems
update to build instructions

added instructions for CMake novices
screenshots
simplifcation and refinement of text
C API docs added and link updated
added travis ci file to check if jekyll can run there
need to remove Gemfile.lock I think
Merge pull request #28 from mgaldzic/new_c_api_and_build_update

New c api and build update