moved /basic/api to /api-overview
Fix redirect to Old-restrictions. spaces into redirects. Remove broken redirects that will never work:
any redirect from /jobs/#a-job will only ever register in the browser as a request for /jobs, as anything past the # is for client-side interaction only.
Merge pull request #323 from gocardless/api-url-change

Move api splash page from /basic/api to /api-overview