Updated OSXPMem readme to discuss 10.9.

BUG=
R=scudette@gmail.com

Review URL: https://codereview.appspot.com/84950043
* Added more information to the imageinfo plugin - boot time, time since boot other stuff from _KUSER_SHARED_DATA.

* Fixed a bug with pdbparse for pdb files without OMAP.

* Started on Windows 8.1 support.

R=adamsh@google.com, parki.san@gmail.com

Review URL: https://codereview.appspot.com/84460045
Refactored the Renderer classes.

- JSONRenderer now inherits from BaseRenderer
- So do table/column
- Shared functionality moved into BaseRenderer/Table/Column
- Fixed lint errors in the ui code
- When running without an interactive session and exceptions are encountered,
  we now print correct stack trace.
- Some other minor tweaks.

BUG=
R=scudette@gmail.com

Review URL: https://codereview.appspot.com/85340044
Merge branch 'master' of https://code.google.com/p/rekall into identity