Link artoolkit5 sources for empscripten and update paths.

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "emscripten/artoolkit5"]
+	path = emscripten/artoolkit5
+	url = https://github.com/artoolkit/artoolkit5

emscripten/HOWTO.md

@@ -0,0 +1,10 @@
+How to update the emscripten build from the ARToolKit sources.
+==============================================================
+
+1. artoolkit5 is linked as a git submodule. Do the following:
+	1. git submodule init
+	2. git submodule update
+2. From the root of the repository, execute the following:
+	* source PATH_TO_EMSCRIPTEN/emsdk_env.sh && emconfigure ./configure && node tools/makem.js
+
+

tools/makem.js

@@ -59,7 +59,7 @@ var ar_sources = [
 	// ARMarkerNFT // trackingSub
 	// 'ARWrapper/ARPattern.cpp'
 ].map(function(src) {
-	return path.resolve(__dirname, '../../lib/SRC/', src);
+	return path.resolve(__dirname, '../emscripten/artoolkit5/lib/SRC/', src);
 });
 
 var ar2_sources = [
@@ -80,7 +80,7 @@ var ar2_sources = [
 	'coord.c',
 	'util.c',
 ].map(function(src) {
-	return path.resolve(__dirname, '../../lib/SRC/AR2/', src);
+	return path.resolve(__dirname, '../emscripten/artoolkit5/lib/SRC/AR2/', src);
 });
 
 var kpm_sources = [
@@ -104,7 +104,7 @@ var kpm_sources = [
 	'FreakMatcher/framework/logger.c*',
 	'FreakMatcher/framework/timers.c*',
 ].map(function(src) {
-	return path.resolve(__dirname, '../..lib/SRC/KPM/', src);
+	return path.resolve(__dirname, '../emscripten/artoolkit5/lib/SRC/KPM/', src);
 });
 
 if (HAVE_NFT) {
@@ -137,7 +137,7 @@ DEBUG_FLAGS += ' -s ALLOW_MEMORY_GROWTH=1';
 DEBUG_FLAGS += '  -s DEMANGLE_SUPPORT=1 ';
 
 var INCLUDES = [
-	path.resolve(__dirname, '../../include'),
+	path.resolve(__dirname, '../emscripten/artoolkit5/include'),
 	OUTPUT_PATH,
 	SOURCE_PATH,
 	// 'lib/SRC/KPM/FreakMatcher',