Doc - Update installation procedure
Merge pull request #17 from ardumont/update-install-procedure

Doc - Update installation procedure
Refactor - Fix title
Doc - Improve action to undertake to activate org-trello on org buffer
Doc - Rename title regarding alternative installations
Add el-get installation procedure step - https://github.com/dimitri/el-get/pull/1769
Update thanks to contributors
Update contributions
Update information about proxy, thanks to this issue for raising this up - https://github.com/org-trello/org-trello/issues/171
Update last modification date
Merge pull request #18 from ardumont/update-doc

Update documentation about el-get recipe + proxy setup