[#5775] ticket:433 Allura Code Viewer: "copied from" improvements
[#5775] ticket:433  set the old rev for copied from link
[#5775] ticket:433 Don't traverse all commits when just second needed
[#5775] ticket:433  fixed filesize after copied from link
[#5775] ticket:433  fixed filesize for svn repo after copied from link
[#5775] ticket:433  fixed "size" in test_log_file
[#5775] Minor change to ensure git process doesn't do any extra work in the background

Signed-off-by: Cory Johns <cjohns@slashdotmedia.com>