Updates to use Mincer 1.0.5

It seems like there were a few reasons a lot of tests were failing when upgrading to Mincer 1.0.5 (#239)
- Compile changed from a callback to a sync format
- Hashes at the end of files changed

### Assets/Connect-Assets
1) The change to account for the now sync nature of compile is handled by invoking the callback with ```null, manifest``` where manifest is the return from compile. 
Since errors in compile will now throw an error that was wrapped in a try/catch and the callback is invoked with the error.

2) Changed the cssCompressor to ```csswring``` for sourcemap support.

### Tests
1) Updated tests with new hashes. Test suite was run on another's machine to ensure they were the same across test runs and machines.

2) ```compiles only those listed in --compile ``` would only generate 2 files. The ```.gz``` file was not generated. Is this something mincer handled before? If so can you shed some light on what the process was

3) All tests pass except 1: ```serveAsset manifest uses an existing manifest if it exists``` 
The manifest that exists is overwritten with the actual manifest.
What should happen for this test? Not sure if functionality changed between versions of mincer around this.

Do we need `csso` now that we’re using `csswring`, or are they complimentary? Forgive my ignorance.