More update for hook docs
More info about checkpoints for manual and autoinstallation
Add contact
Upgrade mode in installer is newly set by Linuxrc (bnc#857847)
New version and changes file entry
Merge pull request #166 from kobliha/upgrade_from_boot_menu

Upgrade mode in installer is newly set by Linuxrc
own yast2 lib dir
changes
better changes
Merge pull request #167 from yast/own_dir

Own dir
- removed unreachable code path
- removed unneeded type conversion
Add notice about list of checkpoints
Merge pull request #165 from vmoravec/hook-docs

Update hook document with content about checkpoints and autoinstallation.
NetworkServices use direct access to wicked when running in installation

inst-sys is not running systemd nor sysV init so "systemctl" cannot be
used. Direct access to network backend is used.

Currently only wicked is assumed to be used as network backend in
inst-sys.
Updated changelog
Refactoring: Turned some NetworkServices globals into constants
Added logging into NetworkServices::run_wicked
Merge pull request #169 from mchf/NI-modifications

Use wicked tool for restart / reload in installation mode
Drop icons in Wizard as it do not provide additional value (proposed by designer Kenneth Wimer)