plugins: add timer/countdown plugin

-New countdown timer plugin with pause, overtime support
-Add full name to credits and manual entry
-Make status strings translatable

Change-Id: I1437b2e5ac5ede292bdab8d36e58b81326ea2ba3

manual/plugins/countdown_timer.tex

@@ -0,0 +1,51 @@
+% $Id$ %
+\subsection{Countdown_timer}
+
+A countdown timer. Set the desired duration, start the countdown, and the
+\dap{} will alert you with a beep sequence when time is up. The timer
+defaults to 10 minutes on launch.
+
+\subsubsection{Setting the timer}
+
+When the plugin starts, the display shows the time to count down from with
+the active field highlighted in brackets (e.g.\ \texttt{[10]:00}).
+
+\begin{btnmap}
+    \opt{scrollwheel}{\PluginScrollFwd{} / \PluginScrollBack{} or }
+    \PluginUp{} / \PluginDown
+       \opt{HAVEREMOTEKEYMAP}{& \PluginRCUp{} / \PluginRCDown}
+    & Increase / decrease the selected field \\
+
+    \PluginLeft{} / \PluginRight
+       \opt{HAVEREMOTEKEYMAP}{& \PluginRCLeft{} / \PluginRCRight}
+    & Switch between the minutes and seconds fields \\
+
+    \PluginSelect
+       \opt{HAVEREMOTEKEYMAP}{& \PluginRCSelect}
+    & Start the countdown \\
+\end{btnmap}
+
+Minutes can be set from 0 to 99 and seconds from 0 to 59. The timer cannot
+be started if both fields are zero. Values wrap around when incremented or
+decremented past their limits.
+
+\subsubsection{Running the timer}
+
+Once started, the remaining time counts down in \texttt{MM:SS} format.
+
+\begin{btnmap}
+    \PluginSelect
+       \opt{HAVEREMOTEKEYMAP}{& \PluginRCSelect}
+    & Pause / resume the timer \\
+
+    \nopt{IPOD_4G_PAD,IPOD_3G_PAD}{\PluginCancel}
+    \opt{IPOD_4G_PAD,IPOD_3G_PAD}{\ButtonMenu}
+       \opt{HAVEREMOTEKEYMAP}{& \PluginRCCancel}
+    & Quit (only available while paused) \\
+\end{btnmap}
+
+When the countdown reaches zero the \dap{} pauses playback, turns on the
+backlight, and plays three beeps. After the alert the timer continues
+running into overtime, displaying the elapsed overtime as
+\texttt{-MM:SS}. Playback resumes automatically after the beep sequence.
+The timer can be quit by pausing it and pressing the quit button.

manual/plugins/main.tex

@@ -297,3 +297,5 @@ option from the \setting{Context Menu} (see \reference{ref:Contextmenu}).}
 \input{plugins/stopwatch.tex}
 
 \input{plugins/text_editor.tex}
+
+\input{plugins/countdown_timer.tex}