Drop Ruby 1.8 support
Merge branch 'master' into drop-old-rubies

* master:
  1.8.7 and ree have issues with AS, lets just ignore them for now
  use built in travis caching
  Test against Ruby 2.2 on Travis CI
  make gem lighter and remove a few things that are default
  Fix example markup
  cleanup instrumentation in railtie
  Fix guardfile
  Specs for watching multiple files
  Release 1.0.2
  Override .load class method to avoid calling Kernel#load
  Exclude rails files from dotenv gem
  Update change log with `Dotenv::Railtie.load` and `dotenv/rails-now`
  Note load order considerations in REAME
  Add dotenv/rails-now to load dotenv immediately
  Rename "dotenv/railtie" to "dotenv/rails"
  Define Dotenv::Railtie.load
  Watch all loaded env files using instrumentation
  Add support for instrumentation
  extend self instead of defining class methods

Conflicts:
	Changelog.md
Remove allowed build failures
Merge pull request #143 from bkeepers/drop-old-rubies

Drop Ruby 1.8 support