Merge pull request #166 from jneurock/master

#165 - Fix for Sass Interpolation Syntax Exception with Media Queries
Version as a property.
Revert back to yui compressor 2.4.7

Because version 2.4.8 of yui compressor has not yet been integrated into the project (due to a couple of bugs), we need to continue using version 2.4.7 for the time being.
Merge pull request #167 from robbyrice/patch-1

Revert back to yui compressor 2.4.7
Reworked the two PNG tasks.
This will close
#163 Image Optimization Broken on Linux/Mac
#147 OptiPNG with unix
#141 You have optipng installed and your version is: usage: grep (Mac OS Lion Mountain)
#149 - fix optipng version regex
Reworked jpeg task workflow
Reworked image flow fixes most of #169
Updated with instructions for new image optimization
reworked image flow one more time
one small adjustment to an <and>
One last issue, I think.
finishing touches. Now to test and release.
update advancecomp from v1.15 to v1.18
dod > doc
Updated gem-sass.jar to use latest version of Sass (3.2.14)