Silence makeinfo error during `make slime.info'

The error reported was:

  slime.texi:536: @itemx must follow @item
Use correct file name (README.md) in mkdist.sh.
Include contrib/ in distrubution built by mkdist.sh.
Highlight README.md's code snippet as Emacs Lisp.
Send Travis email notifications to slime-cvs
Minor highlighting fix in README.md
Merge pull request #70 from nbtrap/include-contrib-in-mkdist

Include contrib/ in distribution built by mkdist.sh
Merge pull request #69 from nbtrap/fix-info-build

Silence makeinfo error during `make slime.info'
Merge remote-tracking branch 'origin/pr/68'

Conflicts:
	mkdist.sh
Replace .cvsignore with .gitignore
REPL prompt now resists being undone..

* contrib/Changelog: Use utf-8 coding.

* contrib/slime-repl.el (slime-repl-insert-prompt): Reset
`buffer-undo-list' after inserting a new prompt.
Fix mkdist.sh line endings

Closes issue #77
Merge pull request #76

Some ASDF cleanups.
Closes #78: `slime-edit-definition' on no symbol should prompt user.

* slime.el (slime-edit-definition): Fix bug introduced by changes
of 2013-12-30. Closes #78.
Disable email notifications from travis

We don't have a good place where to send them.
Modify swank.asd to load the source code without delegating to swank-loader