Revert "Fix wrong url hashes"

This reverts commit 8d2ed150b37c40e0ebc5b971e327d8b02b4abd9c.

See discussion on #459
NetKAN: Escape URLs before writing .ckan files

Fixes #464
NetKAN: Insist on escaping square-brackets, because C# won't.

For #464.
Merge pull request #470 from KSP-CKAN/464_netkan_noramlise

More aggressive escaping of URLs by NetKAN