Bumped version

Author: kpeeters

CMakeLists.txt

@@ -4,7 +4,7 @@ set(CMAKE_LEGACY_CYGWIN_WIN32 0)
 project(Cadabra)
 set(CADABRA_VERSION_MAJOR 2)
 set(CADABRA_VERSION_MINOR 1)
-set(CADABRA_VERSION_PATCH 3)
+set(CADABRA_VERSION_PATCH 4)
 set(COPYRIGHT_YEARS "2001-2017")
 execute_process(COMMAND git rev-parse --short HEAD OUTPUT_VARIABLE GIT_SHORT_SHA     OUTPUT_STRIP_TRAILING_WHITESPACE)
 execute_process(COMMAND git rev-list --count HEAD  OUTPUT_VARIABLE GIT_COMMIT_SERIAL OUTPUT_STRIP_TRAILING_WHITESPACE)