CMake: change project identifier to simplify code

- Using CALAMARES means that the automatic versioning variables
   are set using that name (instead of lower-case).

CMakeLists.txt

@@ -36,10 +36,12 @@
 # to obtain the version number from here.
 
 cmake_minimum_required( VERSION 3.2 FATAL_ERROR )
-project( calamares
+project( CALAMARES
     VERSION 3.2.5
     LANGUAGES C CXX )
 
+set( CALAMARES_VERSION_RC 0 )  # Set to 0 during release cycle, 1 during development
+
 ### OPTIONS
 #
 option( INSTALL_CONFIG "Install configuration files" OFF )
@@ -77,12 +79,6 @@ set( CALAMARES_APPLICATION_NAME  "Calamares" )
 set( CALAMARES_DESCRIPTION_SUMMARY
     "The distribution-independent installer framework" )
 
-# Take settings from the project() command
-set( CALAMARES_VERSION_MAJOR ${calamares_VERSION_MAJOR} )
-set( CALAMARES_VERSION_MINOR ${calamares_VERSION_MINOR} )
-set( CALAMARES_VERSION_PATCH ${calamares_VERSION_PATCH} )
-set( CALAMARES_VERSION_RC 0 )
-
 ### Transifex (languages) info
 #
 # complete = 100% translated,