refs #146 refs #127 Use __thread over thread_local (which is not
available on gcc 4.7)
refs #151 Do not send commit messages for fractal tree update commands
fixes #152 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