Added some shortcuts for commonly used flags#67

Merged

garyb merged 2 commits intopurescript:masterfrom

Risto-Stevcev:master

Oct 7, 2016

Commits on Oct 6, 2016

Added a monoid instance and helper functions to regex flags
Risto-Stevcev
committed

Commits on Oct 7, 2016

Refactored the regex flags code
Risto-Stevcev
committed