Merge pull request #131 from korczis/master

User and Domain improvement
MD object can be saved_as
Merge pull request #140 from fluke777/saveas

MD object can be saved_as
Adding Changelog
Merge pull request #138 from fluke777/changelog

Adding Changelog
Added #name
Fixed Travis CI
Superfluous empty line removed
Fixed Travis CI
Added an identifier setter for MdObject
Merge pull request #143 from korczis/fix-ci

Fixed Travis CI
Merge branch 'master' of https://github.com/gooddata/gooddata-ruby into master-upstream
Merge pull request #142 from korczis/master-upstream

Added #name
Merge pull request #144 from fluke777/master

Added an identifier setter for MdObject
Fixed Travis CI
Removed cli require. CLI should be required only as part of the CLI
Removed fixed date and rubygems version from gemspec.
Version bump
Merge pull request #158 from gooddata/0_6_3_release

0 6 3 release
GoodData::Profile.diff_list and GoodData::User.diff_list tests