added thumbnail generation and upload on FTP server
added upload a copy on my workspace file when sharing a file
implemented the file preview with icons or preview depending on the extension of the file
integrated file uplod progress bar widget for sharing files
Ported to GWT 251
Ported to Feather Weight Stack
Removed GCF Dependency
Logging with sl4j Enabled
Fixed image previes retrieval when image is in the same folder of the linked page
Mention people in tags correctly referred to user profiles
Added possibility to mention people in tags
First Release