Extract navigation drawer to fragment.
Add array list of zabbix servers to preferences.
Refs #6.
Set up server list adapter (using static data atm).
Refs #6.
Add „manage servers“ button (dummy).
Refs #6.
Persist server selection in preferences.
Refs #6.
Add activity to manage Zabbix servers.
Refs #6.
Refactoring.
Preference activity: Add up functionality to Home button.
Server management: add server details fragment.
Refs #6.
Use ViewHolder in servers list view.
Refs #6.
views
settings
add/edit/remove zabbix server
multi server switch working
fixed merging errors
migration
migrate settings
migrate settings
clean+marked todos
create default zabbix server if there is no configuration