Merge pull request #1 from yashodha/CRM-12825

worked on volunteer activity custom data (CRM-12825)
Merge pull request #2 from yashodha/CRM-12825

Crm 12825
Merge pull request #3 from yashodha/CRM-12825

rename the table and columns,fix the activity type on install and uninstall
Added visibility_id to need table, changed role_id to int(10) since a need will only link to a single role.
Change duration to INT.
Merge pull request #4 from davecivicrm/CRM-12825

Added visibility_id to need table, changed role_id to int(10) since a ne...
Remove volunteer_status_id custom field and option_group and insert additional activity status rows for core activity_status option group.
Merge pull request #5 from davecivicrm/CRM-12825

Remove volunteer_status_id custom field and option_group and insert addi...
added look up for Volunteer roles(CRM-12843)