Attemp at scaling the spacing between lines to better fill the text box;

Did some profiling, conclusions:
 - we want to buffer our input streams, apperantly wx doesn't do this automatically
 - compiling regexes is SLOW.
   This is not just in the numbers, but it is actually noticable! The textbox used to be quite unresponsive.
   I wrapped the call to filter_text in the game file with a quick contains() call, so usually, the regex doesn't fire.
   It would be nicer if this was somehow automatic, but that will not be easy.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@627 0fc631ac-6414-0410-93d0-97cfa31319b6

src/data/field/text.hpp

@@ -65,6 +65,9 @@ class TextStyle : public Style {
 	double line_height_soft;					///< Line height for soft linebreaks
 	double line_height_hard;					///< Line height for hard linebreaks
 	double line_height_line;					///< Line height for <line> tags
+	double line_height_soft_max;				///< Maximum line height
+	double line_height_hard_max;				///< Maximum line height
+	double line_height_line_max;				///< Maximum line height
 	String mask_filename;						///< Filename of the mask
 	ContourMask mask;							///< Mask to fit the text to (may be null)
 	Direction direction;						///< In what direction is text layed out?