Get rid of unsupported lambda
Get rid of is_a which is deprecated (sometimes)
Throw exception manually if key not in array
Add file_info dependency to travis job
Update travis
Update travis
Do not use finfo if phpversion == 5.2
Fix comparison of phpversion
Fix mime_info
Fallback to file if mime_content_type returns false
Fix file invocation
Fix mime type compat
Fix mime type compat
Merge branch 'php_5.2_compat'