[Feature request] Add timing option to sassc

[driekus77]

I'm busy looking at the performance of libsass-net and want to reference it with the source: "sassc.exe". However its hard to compare timing results because sassc does not have a timer option.

I know there are options to time a command line tool but on windows you need to install cygwin (time(r)) or powershell first. And lots of compiler tools e.g. xslt compilers add such an option. See this request as Nice to have but not a must. If you don't have time for it I can look at it my self?

Note: I'm impressed with your guys libsass work! Its a small and fast library nice and compact. See speed results on: https://github.com/driekus77/libsass.net.mixed. Unfortunately the .NET part uses more time than your libsass compiler does.

[xzyfer]

@driekus77 noone is actively working on sassc. We're open to contributions though.