remove RTC extern

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/branches/rtc_driver@15427 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0
Change RTC data-types

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/branches/rtc_driver@15449 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0
Resolve RTC conflicts

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/branches/rtc_driver@15460 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0
Modify RTC Test

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/branches/rtc_driver@15732 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0