db_charmer loads its own dependencies

Added for easier usage of db_charmer without rails
Support Rails 3.2.12
Merge pull request #62 from listia/listia

Support Rails 3.2.12
Preparing 1.8.3 release
Merge pull request #61 from khwang/patch-1

db_charmer loads its own dependencies
Test the latest gem
Added additional protection for the ID of Rails environment, used in less than ideal sinatra environments for instance
Add ruby 2.0.0 testing to CI, rmeove ree
Test on the latest Rails versions of each major rails release
Merge pull request #63 from AvnerCohen-Fiverr/additional_sinatra_protection

Added additional protection for the ID of Rails environment
Code cleanup: extract environment detection code into a class method, use class variable for logger
Fix copypasted comment
Increase database connection pool on CI before adding multi-threading tests
Test multi-threading branch on CI
Update site url
Update site url
Update site url
Remove slash from the site links
New rails versions
New rails version