cleaning up installation instructions
expanding docs; placeholder screenshots
adding local storage instructions for fullstack; not sure if they work yet
more detail for how to install the package in a production fullstack
making file paths root relative
clarifying installation options
updating local storage config; still can't confirm if this works
changing file storage settings affect more than just SGA
adding XML example
H2 instead of H1 everywhere
finishing Staff Grading section and adding screenshots
adding OPTIONAL_INSTALLED_APPS section
Hopefully simplified setup instructions
Fixed javascript syntax problem
Merge pull request #40 from mitodl/cg/documentation-updates

Hopefully simplified setup instructions
small fixes from Shira
Merge pull request #37 from mitodl/pdpinch/documentation-updates

Pdpinch/documentation updates