Better execution time limits in examples/halide
Bugfix in stats.py for older pythons
Add custom HalideComputeAtScheduleParameter to examples/halide
Added preliminary simulated annealing technique.

Added methods for getting relative goodness of 2 configurations or results to objectives
Minor suggested edits (indents, logging)
fixed indentation and missing if...
Merge pull request #3 from Sierangho/master

Preliminary simulated annealing technique and methods for comparing relative goodness in objective.py
Merge branch 'master' of git://github.com/jansel/opentuner