Refactor TS build and fix testing

This change is largely just moving files with minor tweaks to them to fix,
the rest of the commit is build process changes:

- The addons/ and test/ dirs have been moved to src/
- The build directory has been removed
- TypeScript builds are output in out/, this is where tests are run
- The demo now relies on the dist/ build which is performed as part of ./bin/build
- Addons are now shipped under the ./build directory

bin/build

@@ -1,5 +1,17 @@
-#! /usr/bin/env sh
+#! /usr/bin/env bash
 
-mkdir -p build
-browserify src/xterm.js --standalone Terminal -p [ tsify ] --outfile build/xterm.js
-cp src/xterm.css build/xterm.css
+# Build all TypeScript files (including tests) to out/
+tsc
+
+# Concat all xterm.js files into a single file and output as a UMD to dist/xterm.js
+browserify out/xterm.js --standalone Terminal -p [ tsify ] --outfile dist/xterm.js
+
+# Copy all CSS files from src/ to dist/
+cd src
+find . -name '*.css' | cpio -pdm ../dist
+cd ..
+
+# Copy addons from out/ to dist/
+cd out/addons
+find . -name '*.js' | cpio -pdm ../../dist/addons
+cd ../..