Merge pull request #149 from mchf/master

Added README.md
Force copying netconfig from instsys to target. bnc#861078

Network configuration is more powerfull in first stage now. So, if user
configures it, keep it for him.

Moreover, some changes (e.g. in linuxrc -> netdevice) caused that creating
default configuration for first device doesn't work properly anymore.

And last but not least approach to net devices in installation has
changed. Installer should be able to use any of available devices, not
only the first one.
Updated changelog
Removed / replaced y2internal calls in save_network
Merge pull request #150 from mchf/bnc861078-save-netconfig

Copy net configuration created during installation to target
Drop tightvnc requirement. bnc#859903

tightvnc do not contain server related tools anymore.
Updated changelog
Merge pull request #151 from mchf/bnc859903-drop-tightvnc-requirement

Drop tightvnc requirement