Merge pull request #6 from jcabi/master

merge from master to my branch
Merge pull request #9 from jcabi/master

merge from master to my repo
Merge pull request #10 from jcabi/master

merge from master to my branch
Issue #91 Milestones.java:43-46: New method remove() to delete
Issue #91 fixed
Issue #91 fixed
Merge pull request #103 from lthuangiang/90

#103: pull request Issue #91  Milestones.java:43-46: New method remove() to delete was implemented
Merge pull request #11 from jcabi/master

merge to my branch
Issue #104 - MkOrganizations.java: Mock for user's Organizations
Issue #104  fixed bug on iterate method
Merge pull request #109 from lthuangiang/104

#109: pull request Issue #104 - MkOrganizations.java:47-49: Mock for user's Organizations was implemented
Merge remote-tracking branch 'upstream/master' into 94