Changelog v.0.1.0.1

Most of this update is balancing the game and trying to explain the player how to play it. 

I'm looking forward for more feedback!

Fixed bugs: 

• ship is being blocked by new ground if placed direct on it.  
• if it's not enough gold or mana, buliding or spell icon will be highlighted red during building

Changes: 

• the shop  is now constantly open, instead of button click required.
• added towers characteristics ( "i" button on the building button in the shop)
• destroyed towers now are prevented from being chosen and highlighted
• tutorial isn't starting automatically on each restart
• tutorial highlights points where you have to build bridges now
• if can't place building or cast spell, spawning a text with reason why 

Balance changes:

• all tower prices are reduced
• all enemy hp are slightly reduced
• increased start money amount
• Bomb spell: damage reduced, range increased
• all the HP of towers are increased
• healing towers cost are reduced