AccountSettings members can be changed and saved
Remove repetition
Merge branch 'master-upstream'

Conflicts:
	lib/gooddata/models/account_settings.rb
Fix test
Eliminate old profile, AccountSettings -> Profile
Fix rubocop issues
Defined comparison operator for classes GoodData::User and GoodData::Profile
Support for creating diff of two GoodData::Profile and applying diffs
diff and apply consistent for GoodData::Profile and GoodData::User
Return Profile instead of raw response json
Merge pull request #131 from korczis/master

User and Domain improvement