Add git to the introductory sentence.
Merge branch 'master' of https://github.com/iauns/cpm
Added FAQ entry regarding when modules are cloned/fetched.
Fix issue in README the -> to.
Remove confusing sentence.
Change include example to AABB instead of Spire.

Since we used AABB as the introductory example instead of Spire.
Add externals JSON file example link.
Fix copy/paste error.
Fix USE_EXISTING_VER example.
Remove ExternalProject dependency. It is not necessary.
Merge branch 'master' of https://github.com/iauns/cpm
Add readme test and fix README.
Upgrade version of CMake used by CPM on Travis CI.
Added note regarding CMake 2.8.9 requirement in Example.
Remove MongoDB's library from example since it requires scons.
Update readme to make the brief example self-contained.

readme-tests was also updated to reflect this new example.
Added note regarding example being self-contained.
SVN failure is no longer fatal.
Improve CPM support for emscripten.
Added GIT cache directory for CPM.

Exposed via: CPM_MODULE_CACH_DIR.