Update dependencies (at least for Ubuntu)

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Fix local installation

Regular users rarely have permission to write into /etc/...

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Add a convenient start script

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Add a .gitignore file

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
start.sh: optionally override the parameters (e.g. to attach to a server)

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
'start.sh attach ...' automatically adds --no-keyboard-sync now

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Revert "'start.sh attach ...' automatically adds --no-keyboard-sync now"

Now Ctrl-A stopped working... :-(

This reverts commit 17465a324b73c73f6df2ae01e507e3cb32a6834a.
start.sh: follow symlinks

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
start.sh: default to attaching to bigmac (except on bigmac)

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
start.sh: if attaching locally, use xrandr to fix the size

It is expected on this developer's server to have a client width larger
than 2048, but the Xpra server is not able to grok that size, really.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>