Fix javadoc formatting errors
Docs update: output of `brooklyn --help`
Disable `-use` in javadoc generation

- fix for NPE when trying to deploy 0.6.0-M1 to sonatype
Update docs: web-console default user:password
Update docs: camel case for privateKeyFile
Merge pull request #880 from aledsage/fix/0.6.0-M1-javadoc-formatting

Fix 0.6.0-M1 javadoc generation, and some docs tidying