Parser testcases
================
Format
------
#data
<css source data>
#errors
<list of expected errors, with line/col offsets> (ignored at present)
#expected
<cssom tree, as below>
#reset
Format of cssom tree
--------------------
line ::= rule | declaration
rule ::= '| ' name
name ::= .+
declaration ::= '| ' property-name ': ' property-value
Example
-------
#data
* { color: #ff0000; background-image: url("foo.png"); }
#errors
#expected
| *
| color: #ff000000
| background-image: url("foo.png")
#reset
TODO
----
+ Permit nesting of rules (for nested block support)