Add Island theme by Tiyuri

Add map 'Hedgewars' by Tiyuri

Mention Luca Bonora on About page

Add italian translation by daimadoshi85

Fix some bugs with dropping from parachute

Initial support for attacking from rope

- Continue preparation for implementing attack from rope and parachute - Parachute turns off when space button is pressed

Some preparation work for attacking from rope, parachute and etc.

Remove AltSlot and AltAmmo fields of Hedgehog record, as they are not actually needed

Timer as hedgehog message (avoid possible desync in very rare cases)

Implement whip weapon

Initial implementation of mortar

Use default ammostore string size for weapons number instead of predefined const

Remove temporary debug messages

If there's more hedgehogs in AI's team than in others, then it will be less afraid to give damage to friend hedgehog

Remove recently added debug, as cluster bomb issue is fixed

It looks like fix for cluster bomb issue...

- Small optimization to hwFloat - More informative debug in rndSign

Fix handling '/skip' command during net game

- Small optimization in hwFloat - Debug message in rndSign to help discover cluster bomb issue

- Some changes in clusters initialization - Dump random numbers buffer on exit

Now really fix issue with mines on top of cases

Fix mines on top of the case issue also

Fix collecting cases after teleportation