Grade improvements.
cpc.rb: Add end statement at bottom of file.

./src/cpc.rb:227: syntax error, unexpected
end-of-input, expecting keyword_ end
Add end to contest_dir
Grades... grades everywhere.
Merge in master.
Consistent spacing
Merge branch 'dev_michael' of github.com:CPLUG/cpc into dev_michael
move_submission
Merge branch 'dev_michael' of github.com:CPLUG/cpc into dev_michael
More spacing issues.
Initial commit of compile/run
Grade should return true
If user is not an admin, don't grade
Remove unnecessary 'return'
problem_list returns just the names of problems instead of their paths
Remove pathname library dependency
More consistent naming scheme
Fix indentation
Clean up code
Remove unnecessary debugging puts