CRM-15598 - Allow relative URL's for Link custom fields

https://issues.civicrm.org/jira/browse/CRM-15598
CRM-15729 - Contact batch update via profile removes group contacts

https://issues.civicrm.org/jira/browse/CRM-15729
CRM-15180 - https://issues.civicrm.org/jira/browse/CRM-15180
Merge pull request #4752 from davecivicrm/CRM-15180

CRM-15180 - https://issues.civicrm.org/jira/browse/CRM-15180
QA fix for CRM-15694
Merge pull request #4754 from rohankatkar/CRM-15694

QA fix for CRM-15694
Merge pull request #4749 from atif-shaikh/CRM-15729

CRM-15729 - Contact batch update via profile removes group contacts
Merge pull request #4724 from atif-shaikh/CRM-15598

CRM-15598 - Allow relative URL's for Link custom fields