kill make(), bindl() in the new parser
clean up the workaround set for spirit a bit
report syntax errors as exactly as possible
remove the := operator for ep writes, = works just fine
just formatting consistency in the grammar
unpack optional<T> to T* during forwarding
start to add include handling
improve syntax error diagnostics for ip literals and comments

 * unterminated block comments yield their own error description
 * ip addresses are displayed entirely, not only their first primitive
   token