Add POT files for online help texts

Use translate-toolkit to generate message catalogs for all online help
texts. Add Transifex resources for each of the message catalogs.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

po/doc/pipe.pot

@@ -0,0 +1,34 @@
+#. extracted from pipe.txt
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2013-07-23 10:28+0200\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"X-Generator: Translate Toolkit 1.10.0\n"
+
+#: pipe.txt:1
+msgid ""
+"Pipe\n"
+"===="
+msgstr ""
+
+#: pipe.txt:4
+msgid "Pipe the selected item to an external program."
+msgstr ""
+
+#: pipe.txt:6
+msgid ""
+"Press the '|' key to pipe the currently selected appointment or todo entry "
+"to\n"
+"an external program."
+msgstr ""
+
+#: pipe.txt:9
+msgid "You will be driven back to calcurse as soon as the program exits."
+msgstr ""