export ECUKES_EMACS in run-travis-ci.sh
Default ECUKES_EMACS to $EMACS

Otherwise, $EMACS set on .travis.yml is not used in test.
Add a scenario for mc/mark-all-symbols-like-this
Add more scenarios for mark-all-*-like-this
Add failing scenarios for mark-all-symbols/words
Automatically select word/symbol
Merge pull request #62 from tkf/export-ECUKES_EMACS

Export $ECUKES_EMACS
Merge pull request #63 from tkf/select-thing-at-point

Automatically select word/symbol
Update README.md