desktop file fixes

[glensc]

rename also Exec line, completes #2

[glensc]

as for the startup, i needed to install caja-dropbox.desktop in autostart dir, then it was started up normally, the extra startup script you created, is not necessary, the main desktop file does the same. caja-dropbox start -i, the -i tells to install missing ~/.dropbox-dist if missing

[glensc]

and the startup file is installed by installer, or can be done from commandline:
(but need to merge this PR, curent master is broken)

vagrant@pld ~/.config/autostart$ caja-dropbox autostart 
dropbox autostart [y/n]

options:
  n  dropbox will not start automatically at login
  y  dropbox will start automatically at login (default)

Note: May only work on current Ubuntu distributions.

vagrant@pld ~/.config/autostart$ ls -l ~/.config/autostart/*dropbox*
ls: cannot access /home/vagrant/.config/autostart/*dropbox*: No such file or directory

vagrant@pld ~/.config/autostart$ caja-dropbox autostart y

vagrant@pld ~/.config/autostart$ ls -l ~/.config/autostart/*dropbox*
-rw-rw-r-- 1 vagrant vagrant 283 Apr  6 13:28 /home/vagrant/.config/autostart/caja-dropbox.desktop

vagrant@pld ~/.config/autostart$ caja-dropbox autostart n

vagrant@pld ~/.config/autostart$ ls -l ~/.config/autostart/*dropbox*
ls: cannot access /home/vagrant/.config/autostart/*dropbox*: No such file or directory

vagrant@pld ~/.config/autostart$ 

[glensc]

downloader in current master downloads, but stop doing anything at 100% with some error on output:

vagrant@pld ~$ caja-dropbox start -i
Starting Dropbox...
** (process:4806): WARNING **: Trying to register gtype 'GMountMountFlags' as enum when in fact it is of type 'GFlags'

** (process:4806): WARNING **: Trying to register gtype 'GDriveStartFlags' as enum when in fact it is of type 'GFlags'

** (process:4806): WARNING **: Trying to register gtype 'GSocketMsgFlags' as enum when in fact it is of type 'GFlags'
/usr/bin/caja-dropbox:351: GtkWarning: IA__gtk_progress_set_percentage: assertion 'percentage >= 0 && percentage <= 1.0' failed
  self.progress.set_fraction(fraction)

your changes in 195f833 came from where? seems like rewrite and your commit message is not helpful at all explaining what you exactly fixed, care to split that commit to smaller commits and create new PR?