Remove from master *.igo files and added TODO.md

From now on `master` will contain only go files compiled from igo.

iGo source code will live in a separate branch, whenever we are ready
for a new release we just simply compile and put new go files into
master, this should work quite well for the golang "module" system.

TODO.md

@@ -0,0 +1,36 @@
+## TODO
+
+- Better handling of '}', avoid new lines
+
+
+### Scoped blocks
+
+```
+{
+  scopedStmtList
+}
+```
+
+should be parsed with the `do` notation like:
+
+```
+do
+  scopedStmtList
+
+```
+
+### Intersperse comments
+
+```
+if /* make it better */ true { }
+```
+
+Will generate:
+
+```
+if
+  # make it better
+  true
+```
+
+which currently isn't valid igo.