initial version of simple profiler that measures method call times
don't include time spent in callees
don't count time spent paused
also call pause hooks when yielding thread
rename vars and remove marginal commentary
disable profiling by default; add URL param to enable it
correct indentation
identify synthetics in profile
identify individual synthetics
make it more obvious which number is the time
Add isDir to stat
Add tests for isDir
Update number of passing fs tests
Add stat data for the / directory in fs.init
Add test for / stat
Use stat in exists instead of reading the whole file
Call the callback in remove after the stat data has been removed
Use stat instead of list in mkdirp
Use stat instead of list in isDirectoryImpl
Don't use exists in mkdirp