closes #1935 staff 500 page
styling fix for 500 pg
WIP doing email stacktrace
make sure that the stacktrace gets logged and sent
upstart script to ensure /mnt perms are right (#1648)
celery workers should scale with cpu's (#1944)
/mnt perms: remove old code for creating /mnt in chef (#1648)
/mnt perms: make sure to create dir (#1648)
Merge branch 'sef-1648-mnt-perms' of https://github.com/Stanford-Online/class2go into sef-1648-mnt-perms
Merge pull request #1932 from Stanford-Online/wescott-master-exercise-work

Wescott master exercise work
interactive grader timeout 5 -> 45 sec; add logging (#1916)
Merge pull request #1953 from Stanford-Online/sef-1916-interactive-timeouts

interactive grader timeout 5 -> 45 sec; add logging (#1916) to master
readme: opscode.org --> opscode.com in link (#1956)
Merge pull request #1957 from Stanford-Online/sef-1956-readme

readme: opscode.org --> opscode.com in link (#1956)
fix user-reported typo
Merge pull request #1959 from Stanford-Online/jinpa-master-typo

fix user-reported typo
mnt perms: ditch upstart (#1648) also terminal color (#1961)
.bashrc - add comments to ease upgrade later
fixes #1917.  Say it ain't so, Joe.

I'm leaving this commit message obtuse also because it's fun to
figure out what this change fixes a db integrity bug.
missed one spot