Adds conversion rule for Spain
Test for spanish convesion rule
Adds conversion rule for Spain
Test for spanish convesion rule
Merge branch 'master' of github.com:descala/iban-tools

Conflicts:
	lib/iban-tools/conversion_rules.yml
	spec/iban-tools/conversion_spec.rb
Merge pull request #6 from descala/master

Adds conversion rule for Spain