Merge pull request #757 from narfbg/2.1-stable

Improve CI_Upload::_file_mime_type() realiability (2.1-stable)
tree: b5ce0542c334627ab5ad37ed928b6e66465e5881
  1. .gitignore
  2. application/
  3. index.php
  4. license.txt
  5. system/
  6. user_guide/