Add install command for po/ directory with cmake

[Olivier Duchateau]

This patch provides install command, in order to install .mo files.

[Olivier Duchateau (duchateau-olivier)]

It's better to replace ${CMAKE_INSTALL_LOCALEDIR} by ${CMAKE_INSTALL_FULL_LOCALEDIR} in main CMakeLists.txt like this

--- ./CMakeLists.txt.orig 2013-09-20 16:37:11.000000000 +0000
+++ ./CMakeLists.txt 2013-09-20 17:06:22.000000000 +0000
@@ -38,7 +38,7 @@
 add_definitions("-DDOCDIR=\"${CMAKE_INSTALL_FULL_DOCDIR}\"")

 add_definitions("-DENABLE_NLS=1")
-add_definitions("-DLOCALEDIR=\"${CMAKE_INSTALL_LOCALEDIR}\"")
+add_definitions("-DLOCALEDIR=\"${CMAKE_INSTALL_FULL_LOCALEDIR}\"")

 file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/config.h" "/* # generated file (stub) */")
 add_definitions("-DHAVE_CONFIG_H=1")

And ${CMAKE_INSTALL_FULL_LOCALEDIR} by ${CMAKE_INSTALL_LOCALEDIR} in po/CMakeLists.txt

[Olivier Duchateau (duchateau-olivier)]

New patch for po/CMakeLists.txt it needs previous patch (comment #3).

[Cris Dywan (kalikiana)]

The patches contradict each other with no explanation. I pushed a heuristic guess of what the outcome was supposed to be to a branch. Please let's avoid the confusion and just have one version that works, no patch on top of another patch mixed with inline comments.