added the feature to create shared schemes for Xcode projects
replace the XML lib from Nokogiri to REXML
unit tests, documentation and minor bug fixes for XCScheme
replacing from attr to attr_reader, to compile on ruby 1.9.3
improvements on documentation, change for test target not be required and remove an unnecessary checking if the file was written
update the documentation for save_as method in the class XCScheme
move the share_scheme to XCScheme class
added compatibility for ruby 1.8.7 fixes
a better name for the method build_target_for_running to follow the ruby code pattern
minor refinements
minor refinements
Merge pull request #64 from heyzooi/master

added the feature to create shared schemes for Xcode projects