Buildsystem: Clean up build-process on all platforms

- Windows: Use CMAKE_INSTALL_PREFIX as a 'final install' directory (thanks to paradox for the preload-handling)
  (New target INSTALL, -not- included as part of ALL_BUILD (must be specifically run for installation to start)
- All: Build libmpq library (used for tools)
- All: Build extractiontools with hardlinked mpq-library (no need to install it anymore)
- All: Move jemalloc from being harddefined to using a CMake string (fixes issue 3378) (thanks to tru.bazoozoo for the idea, alternative added)

--HG--
branch : trunk

src/server/authserver/CMakeLists.txt

@@ -98,4 +98,7 @@ endif()
 if( UNIX )
   install(TARGETS authserver DESTINATION bin)
   install(FILES  authserver.conf.dist DESTINATION etc)
+elseif( WIN32 )
+  install(TARGETS authserver DESTINATION "${CMAKE_INSTALL_PREFIX}")
+  install(FILES authserver.conf.dist DESTINATION "${CMAKE_INSTALL_PREFIX}")
 endif()

src/server/worldserver/CMakeLists.txt

@@ -180,7 +180,7 @@ else()
     collision
     g3dlib
     gsoap
-    jemalloc
+    ${JEMALLOC_LIB}
     ${SCRIPT_LIB}
     ${READLINE_LIBRARY}
     ${TERMCAP_LIBRARY}
@@ -201,5 +201,8 @@ endif()
 
 if( UNIX )
   install(TARGETS worldserver DESTINATION bin)
-  install(FILES   worldserver.conf.dist DESTINATION etc)
+  install(FILES worldserver.conf.dist DESTINATION etc)
+elseif( WIN32 )
+  install(TARGETS worldserver DESTINATION "${CMAKE_INSTALL_PREFIX}")
+  install(FILES worldserver.conf.dist DESTINATION "${CMAKE_INSTALL_PREFIX}")
 endif()