added value check for TC_ESCNULL

 keep control characters escaped

 renamed the newly validated tests

 fixed the position of From/To/Contact parameters

 fixed non-matching of url parameters when there are multiple parameters

 fixed value check for TC_BADBRANCH

 fixed matching urls containing [?,;] but which are not enclosed in <>

 added value check for TC_REGESCRT

 added value check for TC_ESCRURI

 added value check for TC_ESC02

 support matching escaped characters in header names

 do not remove escape sequences in non-generic parameters of via

 fixed value check in TC_SEMIURI with correct escaped string

 transformed TC_REGBADCT into a negative test

 added value check for TC_ESC01

 added a function to decode and normalise the escaped characters

 renamed the positive tortture testcases

 fixed TC_LONGREQ to remove double-quotes in the nameaddr field

 allow returning an undecoded value in TC_SCALAR* (all we need is a codec that does not crash)

 support for decoding quoted strings

 added function for normalising quoted strings
 
 TODO: how to represent unicode characters ?

 added value check for TC_SEMIURI

 renamed negative testcases

 added value check for TC_REGBADCT

 fixed the content of the message in TC_MPART01

 transformed TC_INV2543 into a negative test

 disabled TC_DBLREQ because it is not a codec issue

 transformed TC_CLERR into a negative test

 added value check for TC_BADVERS

 added value check for TC_BADDATE

 added value check for TC_BADBRANCH

 added the remaining torture testcases

 changed TC_NCL into a negative test

 use the value of the Content-Length as a prediction when decoding the message body to ensure that the content length does not mismatch

 throw a DecodeIgnoreMessage after displaying the error message so that the toolkit does not output anything

 improved the messages displayed

 dump a warning and the raw message if the codec is unable to decode a message

 updated the torture tests to handle the raw message in the payload field

 store the message body into the messageBody field and put the raw message into the payload field

 decoding support for RFC 5009