Single draft can not draft two of the same card
Fixed Bans
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#	new file:   src/logic/Arena.java
#	new file:   src/logic/Draft.java
#	new file:   src/util/RandUtil.java
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Added Support for arena card limit
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# On branch master
# Changes to be committed:
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#	new file:   src/logic/Arena.java
#	new file:   src/logic/Draft.java
#	new file:   src/util/RandUtil.java
#