Start refactor logger.
Refactor log.
Remove using log from OpenIabHelper.
Refactor logging.
Update copyright.
Minor fixes.
Merge remote-tracking branch 'upstream/master' into log_refactor

Conflicts:
	library/src/org/onepf/oms/OpenIabHelper.java
Merge remote-tracking branch 'upstream/master'

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Merge pull request #276 from kirich1409/log_refactor

Log refactor