Factor out some of the common homeserver setup code

setup_test_homeserver function in utils.

Single source version and dependencies

Single source version and python dependencies, prevent people accidentally installing with easy_install, use scripts rather than entry_points to install synctl

Hotfixes v0.6.1f

Add performance counters for different stages of loading events

During room intial sync, only calculate current state once.

Transaction counters

txn names

Need to use re.search if looking for matches not at the start of the string. Also comparisons with None should be 'is'.

Profiling