Use valid HTML for empty diff in HTML format
Merge pull request #37 from bricker/valid-html

Don't use DIV tag for empty diff in HTML format
Add Bryan Ricker to contributors
gitignore .bundle
Update gemspec not to use jeweler
Add Ruby 2.1.1 to travis build matrix
Remove old stuff from Rakefile
Explicitly remove tempfiles after diff has been generated

Various rubies have different behaviors as to when they implicitly clean
up tempfiles.  Now diffy will remove tempfiles explicitly, taking care
not to cause problems on rubies that are over eager and may have already
gotten there first.

Resolves #39
Version 3.0.3

Explicitly unlink tempfiles
Handle differences between windows and unix newlines in html formatter

Resolves #38