add coveralls for coverage
add coverage report to readme
Merge pull request #64 from abepetrillo/coverage

Coverage
update coverage pic
trigger a build
change gem source
change to https rubygems
fix build image in README
modifiy .gitignore
Merge pull request #65 from abepetrillo/ignore_list

modify .gitignore
Updated Gemspec for Capybara 2.1
unlocked capybara-webkit gem to enable the capybara update
Since capybara no longer has the wait_until method, I extracted the functional 
part that mater (the timeout function) to evergreen.