Consistently spell 'nochunk' request input key

cfb535f5cbf64c2dd11c88533a62d5ea918ab280 introduced a bug: noChunk was not
consistently spelled. This caused running FitNesse with '-c' to produce
chunked output, which is not desirable.
When chunking is turned off, don't emit the final '0' chunk
Merge pull request #226 from raboof/nochunk

Consistently spell 'nochunk' request input key
Merge branch 'master' of github.com:unclebob/fitnesse