sourceMaps non-string option while sourceComments='map' causes crash

Don't write to disk with --stdout

Fix boolean paramaters

Updated to NAN 1.2.0 and switched NanSymbol to NanNew

Updated submodule readme instructions

Added new libsass file to the gyp configuration

Update to 2.1.0-beta

Fix README to update the submodule with --recursive

Updated to newer libsass

Adding support for passing a precision option to libsass

- Includes some compilation fixes

Testing
----
- Compiled with build-essentials on ubuntu
- Compiled under osx

don't modify the user supplied options object directly

this can cause unindented side-effects if the user uses the same options object for multiple sass calls.

don't prepareOptions twice in `renderFile()`

Doing it twice, once in `renderFile` and then in `render` makes it lose some options.

Fixes sindresorhus/grunt-sass#95

I also made the test actually test includePaths as the current test was faulty.

Drop middleware and examples

Examples been moved to https://github.com/andrew/node-sass-example