Add some basic CMake info to the doxygen docs.

library/Mainpage.dox

@@ -5,6 +5,8 @@ The PolyVox documentation.\n
 
 For a brief introduction, see the \ref tutorial.
 
+To see how to use CMake with %PolyVox, see \ref cmake.
+
 
 \author David Williams
 
@@ -15,7 +17,9 @@ For a brief introduction, see the \ref tutorial.
 /**
 \page tutorial Tutorial
 
-This is a basic tutorial covering the essentials of using PolyVox.
+This is a basic tutorial covering the essentials of using %PolyVox.
+
+\note This is a work in progress. For now, the best example is the OpenGL example distributed with %PolyVox in the example/OpenGL/ folder.
 
 \code
 #include <Block.h>
@@ -26,3 +30,32 @@ int main(int argc, char *argv[])
 }
 \endcode
 */
+
+/**
+\page cmake Finding %PolyVox with CMake
+
+CMakeLists.txt:
+\verbatim
+# Tell CMake the name of you project
+project(MyApp)
+
+# Ask CMake to find PolyVox for you
+find_package(PolyVox REQUIRED)
+
+# Tell your compiler where to look for the PolyVox headers
+include_directories(${PolyVox_INCLUDE_DIRS})
+
+# Create your executable
+add_executable(myapp main.cpp)
+
+# Link it to PolyVox
+target_link_libraries(myapp ${PolyVox_LIBRARIES})
+\endverbatim
+
+Then call cmake with 
+\verbatim
+mkdir build && cd build
+cmake ..
+\endverbatim
+You may also need to pass an argument to cmake if it can't find %PolyVox. Pass <tt>-DCMAKE_PREFIX_PATH=/path/to/polyvox/root/</tt>.
+*/