Support for control directive blocks, e.g. /*rtl:begin:ignore*/ ... /*rtl:end:ignore*/.
Support for strict auto renaming, which ensures autoRename is applied only when a pair exists.
New directives:
- config
- options
- raw
- remove
Support for Plugins.

Upgrading from version 1.0

Options and config settings have changed. However, you need not to worry about your CSS files as all directives are backward-compatible. This is a summary of what's changed:

New Options:
- autoRenameStrict (default: false) to apply auto rename only when a pair exists.
- blacklist to prevent execution of certain directives.
- clean (default: true), to remove directives from output CSS.
- processUrls (default: false) to control URL updates. You can also target specific node types using an object literal. e.g. {'atrule': true, 'decl': false}.
Updated Options:
- autoRename new default is false.
- stringMap:
  - added priority attribute to control maps execution order.
  - added exclusive attribute, which determines if a map execution should stop iterating over other maps.
  - dropped 'west-east' map from the default map collection.
Removed Options:
- enableLogging, still warnings and errors are reported directly to postcss.
- minify, it wasn't actual minification after all!
- swapLeftRightInUrl, swapLtrRtlInUrl and swapWestEastInUrl in favor of processUrls option.
- preserveComments, comments inside declaration values will always be preserved.
- preserveDirectives, in favor of clean option.
Constructor arguments rules, declarations and properties are now replaced with plugins.