FS#11922: Lua game - Pixel Painter

* Changed keymaps to PLA and added to SOURCES and CATEGORIES file
* improved keymaps: implement wrap-around and key repeat
* change keymap according to screen orientation
* fix font size calculation
* use blocking button query in main loop
* replace tabs with spaces
* added manual entry
* added original author to CREDITS

Change-Id: Id67ae99cbb7a737c7f4608e278b77a389ac2ffa6

manual/plugins/pixelpainter.tex

@@ -0,0 +1,24 @@
+\subsection{Pixel Painter}
+\screenshot{plugins/images/ss-pixelpainter}{Pixel Painter}{img:pixelpainter}
+This game is written in LUA and based on the game of the same name by
+Pavel Bakhilau (\url{http://js1k.com/2010-first/demo/453}).
+
+Select a colour to flood-fill the board with that colour, starting from the
+top-left pixel (meaning that any pixel which is connected to the top-left
+through other pixels of the same colour will be changed to the selected colour).
+Try to paint the entire board with as few moves as possible.
+
+\begin{btnmap}
+    \ifnum\dapdisplaywidth<\dapdisplayheight
+        \PluginLeft{} / \PluginRight
+    \else
+        \PluginUp{} / \PluginDown
+    \fi
+    & Move colour selector\\
+
+    \PluginSelect
+    & Fill screen with selected colour\\
+
+    \PluginCancel, \PluginExit
+    & Enter game menu\\
+\end{btnmap}