Add linux memory analysis, fix style.

- Changes to enable us to use /proc/kcore where it exists on linux.  This gives
  us linux memory analysis without the need for a driver. Not quite ready for
  use, but it's close.
- Lots of minor style fixes.
- Some rekall fixes.  We're bringing GRR up to use the current version of
  rekall, which is requiring quite a few changes because rekall is moving fast.
- Moving config rendering to angular.