Fix for Ruby 2.0 and 2.1, which no longer support lambdas on rescue blocks.
Bumped version, made Gemfile secure (https).
Merge pull request #13 from mdsol/fix/ruby_200_support

Fix for Ruby 2.0 and 2.1, which no longer support lambdas on rescue blocks.
Merge pull request #14 from mdsol/develop

Merge ruby 2 compatibility fix