CMake: Find more external libraries

Check for LibNotify, MSpack, XTest and GnomeVFS2.

build/cmake/modules/FindMSPACK.cmake

@@ -0,0 +1,40 @@
+## FindMSPACK.cmake
+##
+## Copyright (C) 2016 Christian Schenk
+## 
+## This file is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published
+## by the Free Software Foundation; either version 2, or (at your
+## option) any later version.
+## 
+## This file is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+## General Public License for more details.
+## 
+## You should have received a copy of the GNU General Public License
+## along with this file; if not, write to the Free Software
+## Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+## USA.
+
+find_path(MSPACK_INCLUDE_DIR
+  NAMES
+    mspack.h
+)
+
+find_library(MSPACK_LIBRARY
+  NAMES
+    mspack
+)
+
+find_package_handle_standard_args(MSPACK DEFAULT_MSG MSPACK_LIBRARY MSPACK_INCLUDE_DIR)
+
+if(MSPACK_FOUND)
+  set(MSPACK_INCLUDE_DIRS ${MSPACK_INCLUDE_DIR})
+  set(MSPACK_LIBRARIES ${MSPACK_LIBRARY})
+else()
+  set(MSPACK_INCLUDE_DIRS)
+  set(MSPACK_LIBRARIES)
+endif()
+
+mark_as_advanced(MSPACK_LIBRARY MSPACK_INCLUDE_DIR)