use composer autoloader in `bin`
Fixed issue with replacing UTF-8 characters

fixes #74
Added test case for invalid UTF8 character replacement

Only \r\n, \n\r, \r, \n and \f will be treat as line break characters.
Which reduced the problem caused by miss replace of a legal UTF-8 character when replacing with preg_replace('~\R~').

close #80
update readme, add CHANGLOG and CONTRIBUTING file

fixes #81
Better fix for invalid UTF-8 code

also much faster

fixes #74
update note about utf8
1.0.1 release
Update .travis.yml
Make readme render on github

try to work around https://github.com/github/markup/issues/380 but only half of it works :-/