Added one-liner apt-get to install all dependencies, for the lazy people

[Photonios]

I know, a useless request. It however, makes people's lives easier...

[ihashacks]

The appropriate one-liner would be:

apt-get build-dep remmina

This way if the build dependencies ever change for the package that single command automatically knows how to pull them in. It pulls the build dependencies from the debian/control file in the package.

[antenore]

@Photonios can you please update it with the @ihashacks suggestion?

[Photonios]

@antenore; good idea, I didn't know that was possible. I will update the pull request later this evening.

[giox069]

I would suggest not to use apt-get build-dep remmina because it also install libfreerdp-dev libfreerdp-plugins-standard and libfreerdp1 from the distro main repos, which are totally incompatible with the current version of freerdp we are using now.
The suggested one liner apt-get should be fine.