Delete README.md

This was meant to be cool developer docs, but now that I think about it, if we do sphinx stuff right, this shouldn't be here.
fix #26 Wrap python tests with CTest

This will make it easy to run any subset of them, as well as
submitting their output to CDash.
Minor developer documentation fix.
Force server unit tests to run serially.

In case anyone gets fancy and tries to run the tests in parallel,
we want to make sure no server-side TestCases are run concurrently.
In general, parallel ctest running will be encouraged in girder
because we will have plenty of other tests that won't conflict,
e.g. front-end tests or style tests.
Merge branch 'master' into repo-structure

Rebase the CMake/CTest stuff onto this, and get the tests
working again.

Conflicts:
	girder/models/README.md
	tests/README.md