my-org: tweak the export and refile settings.
my-org: cache babel hashes to prevent over prompting
my-eproject.el: asm mode with tabs
my-org.el: a number of clean-ups

* don't bind C-f to auto-fill-mode (I use toggles)
* clean-up font locking, add risu mode
* add babel invoke function
.travis.yml: try an clean-up - I use silversearcher now
init.el: don't get caught out by stale .elc files again!