rewrote URLRecode to Ruby to reduce Perl dependencies

specifically for "yast2 repositories" it was the only Perl dependency

Tests exist already and pass: https://github.com/yast/yast-yast2/blob/07b2f5739e1aad7a750327acebbc51325d98e0d0/library/types/testsuite/tests/URLRecode.rb

Version is bumped by 2 to be merged after #202 ;-)