Change pom.xml, add commons-codec dependency.
Add class XorAddition.java, which is responsible for codding password
and make form int hashCode array.
Change XorEncryption and XorDecryption.
Add MockReadableChannel and MockWriteableChannel class to help in tests.
Add XorDecryptionTest and XorEncryptionTest both pass.
Merge branch 'master' of https://@github.com/io-project/meerkat.git

Conflicts:
	pom.xml