Filters issues by milestone via API
Merge branch 'api/issues-filter-milestone' of https://github.com/jubianchi/gitlabhq into jubianchi-api/issues-filter-milestone

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Conflicts:
	CHANGELOG
Merge branch 'jubianchi-api/issues-filter-milestone'