use processes
ability to enable and disable color ansi documention
some cleanup
refine exp-at-point
refactoring builing of help candidates and company candidates

* add more tests
create a specific compile candidates function
fixing complete candidate completion for help and company
refine candidates build functions
remove legacy code
load alchemist-company when company-backends are available
refine erlang completing
replace kill process with clean buffer
clear process buffer
update README
do not load alchemist-company by default
bump version 0.7.0
update CHANGELOG
Merge pull request #19 from tonini/complete-functionality

Complete functionality