exscript: refactoring: Simplified some code in Lexer.
exscript: protocols: Added cleaning method for removing escape characters of the protocol from input.
exscript: Fixed bug: HP Procurve driver uses list of compiled regular expressions.
exscript: HP Procurve driver: Better response cleaning and promt matching.
exscript: HP Procurve: driver: Fixed bug: Use of not existing variable.