Support for GD_GEM_USER, GD_GEM_PASSWORD
Mentioned possibility of GD_GEM_USER, GD_GEM_PASSWORD usage in CHANGELOG.md
Fixes wrong merge of options passed to GoodData::Domain#find_user_by_login

Fixes #356
Fix test
Fixed PR
Merge branch 'master' of https://github.com/gooddata/gooddata-ruby into gd-vars

Conflicts:
	CHANGELOG.md
Fix issues
Fix issues
Merge branch 'master' of https://github.com/gooddata/gooddata-ruby into fix-find-user-by-login
Fix Domain#add_user instance method

Fixes #354
Fix rubocop issues
Merge branch 'master' of https://github.com/gooddata/gooddata-ruby into fix-domain-add-user

Conflicts:
	CHANGELOG.md
Merge pull request #375 from korczis/fix-domain-add-user

Fix Domain#add_user instance method
Merge pull request #353 from korczis/gd-vars

Support for GD_GEM_USER, GD_GEM_PASSWORD
Update CHANGELOG.md
Merge pull request #359 from korczis/fix-find-user-by-login

Fixes wrong merge of options passed to GoodData::Domain#find_user_by_log...
Merge branch 'master' of https://github.com/gooddata/gooddata-ruby into schedule-execute-wait-option

Conflicts:
	CHANGELOG.md