Merge pull request #259 from Ansa89/italian-translation

Italian translation: update
initial merging common parts of chatforms' widget
code cleanup
addMessage moved to parent class
cleanup
new chat beginning
somehow working example
rewrite
cleanup
scroll fix
files renaming
code cleanup: html creation code moved to the separated functions
filetransferinstance should use own pictures
show image preview after file receiving completed
FileTransferInstance: correct buttons displaying
Merge pull request #262 from apprb/dev

ChatForm unification
code cleanup
filetransfer: original buttons positions
Merge pull request #264 from apprb/chatform

ChatForm
Italian translation: update