Added sign in page.
Merge branch 'develop' of https://github.com/alxdarksage/Bridge into develop

Conflicts:
	webapp/src/main/webapp/WEB-INF/jsp/signIn.jsp
Changing Logger class imported (the other log4j class doesn't log anything)
Merge branch 'develop' of https://github.com/Sage-Bionetworks/Bridge into develop
Merge branch 'develop' of https://github.com/Sage-Bionetworks/Bridge into develop
Merge pull request #5 from alxdarksage/develop

Fixed logging for sign in controller.