Reality.eth links fix

[sacshin]

It was reported by 'davidoj' in Keybase that Reality.eth links need to have "/contract/v2.1" appended at the end of the url for the question to load correctly.

Example:
Omen is generating this link, which doesn't load -> https://realityeth.github.io/#!/question/0xc34fe2b6c70278de036d746e8de39f3ad617b204d9fcd3e1f023b48d97fec454

It should generate links that look like that instead -> https://realityeth.github.io/#!/question/0xc34fe2b6c70278de036d746e8de39f3ad617b204d9fcd3e1f023b48d97fec454/contract/v2.1