Expanded mode + SASS

I've added in SASS files and the basic structure using the current CSS. I'm unsure how to get CommaFeed to compile these for me and am currently compiling them outside using CodeKit. I'm compiling the SASS in expanded mode. Feel free to continue working in the straight CSS file and I'll continue porting new styles into the SASS until we can get CommaFeed to do the compile.

The CSS changes add some padding to the left of open entries, add a transparent border-left for non-current entries in the expanded mode so there isn't a 1px jump between current entries.

I've added a couple classes for later changes to the header of open entries, as well as disabled the scroll-to for when the list is in expanded mode.