add flattr and gittip buttons
v2.0.2
Don't update HTML output on exceptions
test against tilt 2.0.0
travis: version bump
test ruby 2.1.0
write some documentation about includes

close #462
close #463
fix #474
render empty html5 attributes standalone, see #480

tests missing
changes

[ci skip]
fix #482, problem with whitespace modifier `tag=<`
add test case for #480
Added Atom syntax highlighting to README
fix #485 end inserter with test cases
changes

[ci skip]
Add Japanese README
Merge pull request #486 from yterajima/issue/japanese_readme

Add Japanese README
Merge branch 'master' into smart-text

Conflicts:
	lib/slim/parser.rb