This function was defined in the Header file, but
had been moved from the .cpp file. I'm assuming it
was removed since there aren't any special memory
handling requirements associated with a folder_context.
I could have removed the def from the header file,
but I felt it better to keep an extremely consistent
interface. Today, we don't have any special needs
with the folder_context, but in the future we could
want to do some other cleanup/etc. So, to fix this
issue, I created a simple drop-in sass_free_folder_context
method.

This issue was blocking Ruby from building the library.
Using consistent spacing to the rest of the file for a single-line function.
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Add SVN and visual studio project files to gitignore
Merge https://github.com/hcatlin/libsass
Merge https://github.com/hcatlin/libsass
Set default values for sassc and sass-spec.
Enable autotools compilation on Travis.
Add --skip on Travis.

For personal development, it's good to stop on the first error, but for
CI, it's better to see the overall pass-fail rate.
Set up testing with autotools.
Enable autotools testing on Travis.
Remove -d for specifying spec directory.
Use automake's test driver.
Enable verbose output on Travis with automake.
Fix --skip in Travis with default Makefile.
Fix automake tests when sass-spec-dir is absolute.

It seems that automake gets confused with an absolute test path, even if
that path is contained in this directory. It doesn't seem to care if the
directory is outside the source directory, so we just make the absolute
paths relative. Not so easy in sh, but fortunately, we already require
ruby in this region of configure.
Simplifying the language on the Contributor Agreement.
Merge https://github.com/hcatlin/libsass
Provide a way to query all the imported files

This is very useful if you want to cache generated css and
need a way to invalidate the cache.