0.1.0

• Implements privateBalance end-point
• Add Currency constants class

0.0.5

Handle errors returned by Kraken

close #2

0.0.4

Add static functions helper to CurrencyPair class

0.0.3

• Add class constant for currency pairs

0.0.2

Fix phpdocs

0.0.1

Check if response is an array + fix small issues with setters/getters…