Make guicast/stringfile.C handle longer length

Fixed a bug in the calculation, by including the indentation when
figuring out if there is room enough, and dropped an unused variable.
Clean up Debian package build rules

The build dependencies were slightly outdated.
All the build dependencies are present in Debian Jessie (next future version),
but not using the correct package names.
Updated debian control file to reflect CV status and updated email list

The control file in the debian folder still reflect the roots in hvirtual,
and has the old email for the listserve. This patch fixes both.
Update copyright note in debian folder

This patch provides a more meaningful and updated copyright note in the debian folder.
Updated debian rules file
Updated changelog debian file

The debian changelog refered to this as the hvirtual build package.
This patch changes it to cinelerra-cv, updates the version number (rather old)
and refers to the current git.