Added CooldownScoreboard

* Fixed couple of bugs
* Added Scoreboard with hero's cooldowns
* Next thing to do: SkillBar
Added CooldownScoreboard.java

I haven't used EGit for long time. I forgot I have to add it for the
index.
Create SkillBar

For now you can't get it. It does not have support for configurating it
(items' lore). CooldownScoreboard still need more things in config.

Features:
* SkillItem - press number on keyboard to activate skill
* SkillBlock - you can't use MouseWheel to get farer than item before
the SkillBlock
* Items are saved in database after player quit.
* Fully optional
Added possibility to get SkillBar items.

* Created BarBlockItem
* Now item moves on assigning if this place is currently occupied by
something

Now it's time for TESTING!