Treat all non ascii chars (utf-8) as alpha characters
Merge pull request #283 from mgreter/unicode-alphachars

Treat all non ascii chars (utf-8) as alpha characters
patching an odd bug ... need to dig deeper to find the root cause
workin' on some more obscure edge cases
fixing some edge cases and regressions with the recent @extend updates
fix parameter to max()
Merge pull request #294 from errorx666/master

fix parameter to max()
Fix sass_interface to use new C_Function_Descriptor

Has obviously been renamed from C_Function_Data
Protect entry_point and image_path from NULL

Libsass crashes if implementer does not set a default
option for image_path. Protect the sass_interface the
same way as SassC does.
Implement custom c function again after refactoring

Re-introduced cookie for c functions (pointer to anything).
Moved actual function registration right after the built
in functions are registered.
Enhance special IE parsing for alpha opacity
Enhance special IE parsing for expressions