more hero abilities

[mirko93s]

#44
We can calculate how much xp the hero has given the round we are in and the round he was placed on.
We already have this infos in the bot.

If we do so we can dinamically calculate on which round each ability will be unlocked and we can also update the cooldowns, many abilties have reduced cooldowns at certain hero levels.

static.py could be changed in something like this example with quincy:

"QUICY" : {
    #xp : [cooldowns]
    640 : [60], # 1st ability unlocked
    43280 : [60,70], # 2nd ability unlocked
    122030 : [45,70], # lvl 15 1st ability improved cooldown
    179810 : [45,55] # lvl 18 2nd ability improved cooldown
}