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

src/test/escape_sequence_files/t0034-VPR.text

@@ -0,0 +1,25 @@
+b 1
+c  2
+d   3
+e
+f    4
+g
+h
+i     5
+j
+k
+l
+m
+n
+o
+p
+q                                                                             A
+r                                                                              B
+s                                                                              C
+t                                                                              D
+u                                                                              E
+v
+w
+x
+       Bottom line.
+