Also skip testing with emacs-snapshot if only recipes have been updated.
* test/run-travis-ci.sh: Deleted.
* test/travis-ci.sh (prereqs, byte-compile, check-recipes,
check-whitespace): New functions.
* .travis.yml (language): emacs-lisp -> generic. emacs-lisp is not
recognized, so Travis would treat it as ruby and needlessly install
rvm.
(install, script): Call functions from travis-ci.sh.
- use github emacs mirror for travis test: repo.or.cz was down a few
times; since github.com must be up to run anything anyway, it's
preferable to rely on that instead.
- run all the apt commands separately; there have been some intermittent
failures, this should make it easier to diagnose.
- suppress curl progress bar
- show emacs --version before running tests
