Merge pull request #1 from kittee/master

export update/4
If columns is proplist, than key field rename to value in result
Add fun for call
Add fun for call
Merge branch 'master' of github.com:saa/edwin
Update emysql version
Add temp function: columns_as
Return value always list of proplists
Changes:
* Add travis-ci config
* Remove lists:flatten for proplists
Add new otp versions for travis
Add README file
Change make command
Fix deps url
Fix app.src
Again
Update .app.src file
Remove travis status icon
allow setting comparison operator
emysql version fix
Move to maps