api: Print out entire response on error
api: Print out entire response on error

Rather than printing out what appears to be a non-existent 'detail' key,
simply print the entire response back to the user.

Signed-off-by: Stephen Finucane <06fa905d7f2aaced6dc72e9511c71a2a51e8aead@that.guru>
Fixes: #9

stephenfin/git-pw,getpatchwork/git-pw