Log Message:
Update ruby-simple_oauth to 0.1.5.

* Rakefiles are executables, and rake loads rake, not rakefile code
* Replace rcov with simplecov
* Convert README to Markdown
* Convert LICENSE to Markdown
* Replace rdoc with yard
* Add turn in development for more verbose test output
* Trust the load path
* Remove vestigial VERSION file
* Add Travis configuration file
* Bundle setup before running tests
* Require rubygems
* Add bundler as a development dependency
* Apparently, Object#tap was added in 1.8.7, not 1.9
* Add jruby-openssl dependency
* Add link to Travis CI
* Remove vestigial rdoc options from gem specification
* Bump version to 0.1.5