Merge in changes from individual branches from staging branch

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/trunk@16136 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0
Appease some warnings related to asm and integers and clang

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/trunk@16137 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0
Fix linking issue with gcc by substituting ld

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/trunk@16138 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0
Rewrite isr_stub to make use of preprocessor macros

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/trunk@16300 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0
Update isr.c to use defines instead of integer constants

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/trunk@16301 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0
Clean up paging.c

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/trunk@16316 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0
Remove unnecessary file

git-svn-id: https://subversion.ews.illinois.edu/svn/sp14-ece391/_projects/group14/trunk@16317 1cec0ab5-dbbe-4d55-bb2a-e14ca091d7d0