delete submodules
subrepo clone: git@github.com:ingydotnet/test-more-bash.git (master) -> ext/test-more-bash/

  subdir: ext/test-more-bash
  remote: git@github.com:ingydotnet/test-more-bash.git
  branch: master
  commit: cb27f05

git-subrepo version: 0.1.0
Merge subrepo commit '8b1e94a'
subrepo clone: git@github.com:ingydotnet/json-bash.git (master) -> ext/json-bash/

  subdir: ext/json-bash
  remote: git@github.com:ingydotnet/json-bash.git
  branch: master
  commit: 34f504b

git-subrepo version: 0.1.0
Merge subrepo commit '935dc48'
subrepo clone: git@github.com:ingydotnet/bashplus.git (master) -> ext/bashplus/

  subdir: ext/bashplus
  remote: git@github.com:ingydotnet/bashplus.git
  branch: master
  commit: 6f15ca5

git-subrepo version: 0.1.0
Merge subrepo commit '3cd3e7d'
Don't use submodules in Makefile and travis
remove submodules from doc