get first CTRunDelegate attribute (fix #18)
Merge pull request #27 from usami-k/fix_issue18

get first CTRunDelegate attribute (fix #18)
Update README.md
Remove dead code.
Tweaks
Fix indentation(Tab -> Space).
Fix crash on adding attachments, due to replacing range out of bounds.
Merge pull request #29 from kishikawakatsumi/fix_replace

Fix crash on adding attachments, due to replacing range out of bounds.
Update podspec
Fix compatibility issue.
Update podspec.