Added multiline parameter support and added table and multiline parameter printing in the plain text formatter

Added support for multiline parameters.  Also added support for printing table and multiline parameters to the plain text formatter.   Improved the step.Title builder to use regular expressions instead of expecting "(.*)" for all parameters.  The plain text formatter could use some optimization.

I accidentally reformatted the Step class to use 2 spaces for indentation.  You can reformat this back to 4 spaces.  The only thing I changed in this class was add the MultilineParameter property.  

Also, you'll probably want to optimize the GetMaxColumnCharaters to use a cache instead of iterating over every value for the column each time you call it.