Implement thread_local in a gcc-4.7.2-friendly way
refs #151 Do not send commit messages for fractal tree update commands
Add accounting for long input buffer wait stalls
Parameterize the partial eviction strategy for nonleaf nodes and add a
parameter for whether leaf nodes get written out on flush.

Conflicts:
	ft/ft-ops.cc
Remove cruft - this commit needs to die

Conflicts:
	ft/ft-ops.cc