randomize order of test execution by make runtest
set phase in dropout tests
add device id arg to test_net (fix #232)
proofreading and trivial polish
Merge pull request #367 from shelhamer/randomize-test-order

Randomize order of test execution by `make runtest`
set seed in neuron and power layer tests for deterministic results
default test net device to 0 and log device chosen
fix test_net to upgrade params from v0 if needed
Merge pull request #370 from shelhamer/test-net-polish

Polish test_net