Clean up

- Rename files: gonzales.cssp & cssp.ast -> css-to-ast
- Rename files: cssp.translator -> ast-to-css
- Rename nodes: clazz -> class
- Rename nodes: funktion -> function
- Remove `fail()` function
- Remove `currentBlockLN` var -> get line number inside `throwError()` function
- Reset counters when getting tokens for a new string
- Check if token exists before doing anything else
- Divide syntax rules to separate files: rules-<syntax>.js
- Tests: require one gonzales module
- Update comments
v2.0.0-rc1
New node type `propertyDelim`
Tests: Catch errors (show which test failed)
Sass: Support indented syntax

- Blocks without `{` and `}`
- Declaration delimiter is `\n` instead of `;`
- Property can start with a semicolon: `:color tomato`
- Mixin `=nani` or `= nani` (same as `@mixin nani`)
- Includes: `+nani` but not `+ nani` (same as `@include nani`)
Rename node: decldelim -> declDelim
Clean up

- Reorganize code
- Move mark functions to syntax methods
Make parsing of comments syntax specific