Added test cases for !default properties with spaces
attempt fix of #82
avoid: Uninitialized string offset: 0
add tests for issue #50
varargs fix
throw exception for unused arguments
refactor ExceptionTest and add a couple more test cases
more closely mimic ruby sass precision by more closely following the ruby implementation
remove ini_set("precision", 15) as it only affects output
Update README.md
Mixin @content with embedded mixin test cases

@include inside of a @content block causes issues
fixes issue #87 at leafo/scssphp
removed comment
added test mixins output
fix from @albyrock87
Merge pull request #86 from robocoder/default-bug

fix !default bug
clean up #86
Merge remote-tracking branch 'regaddi/fix_mixin_content_includes' into rc
cleanup #90
varargs: merge #62, fixes #50