Fixed compatibility issue with PolarSSL 1.3.x.
Separated IV initialization from reset.
Merge branch 'master' into support/latest-polarssl-compatibility

Conflicts:
	test/cipher_encryption_test.rb
Fixed tests. Removed empty test
Travis CI polarssl-dev install
Travis CI settings to install libpolarssl 1.3.9
Merge branch 'master' into support/latest-polarssl-compatibility

Conflicts:
	.travis.yml
	test/cipher_encryption_test.rb
Fixed previous merge
Merge pull request #7 from oiuzikov/support/latest-polarssl-compatibility

Support the latest PolarSSL