use proper int type

closes github issue #20

from https://github.com/dropbox/nautilus-dropbox/pull/1

The encoding on stdin and stdout are usually ascii and may cause problems
with writing unicode to it. Instead of this we open the file directly
and avoid dealing with annoying unicode encode/decode errors.

setup autostart file after install

update download code from nautilus-dropbox-1.6.2

desktop file fixes

fix use of defines

merged changes from nautilus-dropbox 1.6.1 to 1.6.2

this bug happens when you try to press cancel on first dialog

this is supposedly done originally by ~/.dropbox-dist/dropbox, but as it
doesn't recognize MATE, do the autostart file after download

ps: the autostart file can be done if you toggle 'do not show this
dialog' message twice in dialog which appears before download start

http://linux.dropbox.com/packages/nautilus-dropbox-1.6.1.tar.bz2

this time desktop file path which is used to setup/remove autostart

rename also Exec line, completes #2

caja is at 1.5 so 2.22 and older version probably is wrong
last gnome2 was 2.32.2.1 for nautilus

Add  to ACLOCAL_AMFLAGS for user added flags