Log message:
Changes 3.3.6:
Expose the Sass language version via the C API

Fixes:
Incorrectly erring on comments in at-rules
Incorrectly dropping internal state of AST nodes
Incorrectly parsing the calc function
Segfault during error handling
Incorrectly identifying the selectors with type-of
Incorrectly erring on ID selectors starting with a number
Producing incorrect output when compile with MSVC
Various segfaults and incorrect output from @extend

Log message:
Changes 3.3.4:
Fixes:
* Inconsistent error message produced when nesting functions and mixins
* Ensure custom importers are executed for all @imports
* Ensure custom importers are executed in the correct order
* Possible segfault when generating sourcemaps
* Memory leak
* Unused variable warning
* Segfaulting when @extending an undefined selector
* Incorrectly erring when @extending inside a mixin
* Handle signed char when considering @charset
* New link to sassc-ruby in documentation
* Incorrectly quoting interpolated strings join with +
* Incorrectly erring when using & and interpolation together
* Incorrectly duplicating nested pseudo selectors
* Unused function breaking breaking unity builds
* Segfaulting when url() is empty
* Should error when & is used without a parent selector

Log message:
Changes 3.3.3:
* Parser and rendering refactorings
* Full support for variable arguments
* Lots of bug-fixes
* Improved spec tests

Log message:
LibSass is a C/C++ port of the Sass CSS precompiler. The original version was
written in Ruby, but this version is meant for efficiency and portability.

This library strives to be light, simple, and easy to build and integrate with
a variety of platforms and languages.