Code completion - simple word style

[de-jcup]

There shall be a simple code completion for existing words in document.

E.g.:
"ensure you are saving the environment"
type "e" will show up "ensure|environement" as proposals.

[de-jcup]

The implementation must be done in sub-library of
de-jcup/egradle#281
and just reused

I simply wrote an own implementation for bash editor - currently I do not want to check in more binaries (jar) in repositories. Also it makes no sense to have such thing inside EGradle because we got a dedicated code assistence for gradle here...