Merge branch 'relase'
Proxys server loader class skeleton.
Refactoring - MainWindow and Listener classes.
Refactoring - mainly Downloader and Listener classes.
New downloading possibility - terrain map. Small refactor in few
classes.
Proxy servers downloading skeleton. Downloading unavailable now.
ProxyServerManager skeleton created, but now application is working
normally.
Added menu and implemented "About" window.
Added proxy settings window.
All sources splitted into two packages.
Proxy servers file path loading fix.
About window message changed.
Exception refactor in ButtonListener. ServerLoader partially
implemented.
ServerLoader implemented.
Implemented ProxyServerManager. Now downloading through proxy should be
possible. Few small changes.
Readme changed. Next version description.