Log Message:
Updated p5-Crypt-ECB to 2.20.

v2.20, 30.03.2016
	- made passing a custom padding method possible without specifying a cipher before
	- added verifying correct truncation of custom padding methods
	- added verifying padded bytes when truncating (for standard and zeroes padding)
	- added testing encrypt_hex and decrypt_hex function style
	- added testing start-crypt-finish
	- added testing usage of pre-existing cipher objects
	- updated eg/ecb.pl to recognize cipher modules in the Crypt::OpenSSL namespace
	- added option to eg/ecb.pl to print the Crypt::ECB version used
	- changed license again, to GPL or Artistic