custom error pages

Implemented custom error handlers to show prettier 4xx and 5xx errors
Adding metrics to 5xx/4xx error handlers

Now tinyfeedback can show errors that tornado handles
Merge pull request #58 from bkendall/custom-error-pages

custom error pages
Merge branch 'master', remote-tracking branch 'origin/master'
Initial Docker setup

'working' configuration; need to do some cleaning!
Adding Docker documentation for ORL
Added --smallfiles for mongo on micro instance support
Docker updates--Makefile

- Added a makefile to make it easier to create images.
- Set up orl-server image to use local repository as source for server
Clean up whitespace