Release 0.3.0

• #9 Username/password authentication added. Additionally it is no longer required to provide an authentication method (this allows for sending inquiries about publicly available resources)
• #10 User Impersonation feature added
• #11 All types are now available for import

Bugfix

• #12 Updated error handling

Improvements

• #8 done_ratio, start_date and due_date parameters are available in create/update issue methods
• #13 Redundant files removed from npm, documentation updated