add unit/data_type management, remove old bits
Update binding_of_caller to support ruby 2.0.0
First Travis-CI test
Make Travis-CI copy database.yml
Install librrd4 before travis tests
We need librrd4-dev...
Aaaand its librrd-dev
Dont use mysql in Travis yet, and display buidl status in README

We need to handle different db engines in the Gemfile
Merge remote-tracking branch 'upstream/master' into tests

Conflicts:
	README.md
Merge pull request #44 from renchap/tests

Tests
Merge pull request #45 from josqu4red/units

add unit/data_type management, remove old bits