(svn r6962) -Fix r6961: spacing...

(svn r6961) -Codechange: Remove relic from r212 WWT_NODISTXTBTN which was originally used to not
to allow clicking if a button was disabled. This has been superseded in r212 with
general code that doesn't allow any click events for disabled buttons.

(svn r6960) - Feature: NewGRF: Implement some support for GRF Resource Management (GRM)

(svn r6959) -Codechange: Move GfxFillRect() out of the chat-message drawing loop since we already
know how many lines we are going to draw. On certain architectures this results in a
minor penalty of local function performance if only 1 line is drawn. But starting from
2 and more you'll get a net gain.

(svn r6958) -Fix (r6956): GCC warning (thx Tron) and a coding style forgotten in r6957

(svn r6957) -Cleanup: comments, coding style

(svn r6956) -Feature: Increase the chatbuffer of chat messages. Messages longer than the allocated
graphical box will be wrapped to a new line.

(svn r6955) -Codechange: Change some variable names for _textmessage_box, and replace 5 different
global variables with a single struct.

(svn r6954) -Feature: Constrain the drawing of a string inside an editbox to the dimensions of
the widget it is in. This allows for typing longer text into an editbox (if maxwidth
allows of course) and scroll around properly.

(svn r6953) -Codechange: Change FormatStringLinebreaks in such a way that if no whitespace was seen
for the 'current line' of a certain maximum width, the string will be truncated instead
of the old behaviour which just left it alone.