CXX-74 move some things around in .travis-ci
CXX-74 convert README to markdown and add travis badge
Modernize contributors file a bit by converting to markdown
CXX-38 make the documentation better

- Create a docs folder for future use and for placing doxygen output
- Take ownership of the doxygenConfig and tweak some settings
- Document the mongo and mongo::client namespaces so functions inside of
  them are documented
CXX-38 quote name of project