Fix include paths order

We used to include `.` and `include/`, but the former is no longer
necessary and the latter has to have the highest priority to avoid that
installed headers take higher precedence, leading to a build employing
outdated headers.

CMakeLists.txt

@@ -6,6 +6,9 @@ cmake_minimum_required(VERSION 2.8)
 
 project(revamb)
 
+# This has to be first to get highest priority
+include_directories(include/)
+
 # Doxygen
 find_package(Doxygen)
 if(DOXYGEN_FOUND)
@@ -136,8 +139,6 @@ endif()
 
 set(CMAKE_INSTALL_RPATH "\$ORIGIN/../lib${LLVM_LIBDIR_SUFFIX}")
 
-include_directories(./ include/)
-
 add_subdirectory(lib)
 add_subdirectory(tools)