Feature/45 does not open new tab for already opened file

[KES777]

This patch closes this Now, if you try to open same file twice the old 'tab' will be brought to front

Because of same directory tree structure is created localy under tmp directory we can see nice hints on tabs. So this patch close that issue too

[randy3k]

Due to the slow development of rsub, I am now maintaining a fork of rsub at https://github.com/randy3k/RemoteSubl and it has included this feature.