Merge pull request #6 from yashodha/CRM-12825

added look up for Volunteer roles(CRM-12843)
Merge pull request #7 from yashodha/CRM-12825

used api to create the option values for existing option group
Merge pull request #8 from yashodha/CRM-12825

cleaned up activity status from xml
Merge pull request #9 from yashodha/CRM-12825

Crm 12825
CRM-12825 modify schema to add volunteer_project table and change volunteer_need table to link to events via volunteer_project.
Merge pull request #10 from davecivicrm/CRM-12825-2

CRM-12825 modify schema to add volunteer_project table and change volunt...
generalized hook (CRM-12864)