v0.17.0-beta

update:

• installer script version
• make slider markers oval
• play clicking sound when switching to controls menu
• explosions now truncate snake's body
• increase width of completion circle
• display mines countdown before explosion
• use small completion width when icons are intended as buttons

bugfix:

• icon buttons display a canvas-coloured line on the left when Shape.OVAL
• fixed behavior of icons when stepped on/off
• shouldn't be able to bypass the dialog window when switching settings tabs to Controls
• wrong message displayed when returning from Settings menu to main menu
• typo in message displayed when switching tabs