Add file upload API and drop/select feature. Uploading progress UI not designed yet.
adding styles for files being uploaded. Changed all html node generating codes to jquery style.
add all file upload functionals.
modified readme, v0.3.0 ready to release.
Fixed 7 bugs. 1. File upload limit reduced to 2MB.
2. Cancel button correctlly works in write-post panel.
3. No old attaches after cancelling a post.
4. PCManFM now works with Firefox.
5. Chinese long filename now displays correctly.
6. No alerts will block the path button.
7. Jump with -1 -- let it go.
Merge pull request #9 from mrroach9/dev-v0.3.0

Dev v0.3.0
Merge remote-tracking branch 'upstream/master' into dev-v0.3.0