document exceptions raise by Mustermann.new and Mustermann[]
change error syntax
be consistent with namespacing in docs
change coverage directory
Merge branch 'master' into expand
add expand matcher
split up spec/support
refactor ast nodes and parsing
Merge branch 'refactor-ast'
expand specs for rails patterns (failing)
commented out specs for when we add expand specs to sinatra patterns
keep ast around
add AST#expand
Merge branch 'master' into expand

Conflicts:
	lib/mustermann/ast.rb
first (slow) version of expand