This closes #280

Removed Disclaimer file
Eliminated unnecessary incubating substrings
Bumped version to 0.9-SNAPSHOT

This closes #260

java complains about not expecting an interface here. Needs to be `implements` instead of `extends`.

This closes #257

This closes #194

[streaming] Documentation added for streaming java 8 support

Made exceptions for license check plugin more fine-granular.

This closes #250

[streaming] Updated streaming-guide to match recent api changes

[streaming] Fixed windowing examples by removing manual setting of source parallelism

[streaming] Extended streaming guide with a section about the new policy based windowing.

- Move some background on the most important configuration values into the configuration guide
- Remove the term "UDF" because it is often being confused with UDFs in SQL
- Fixe some typos

This closes #242

Local builds of the docs without a web server (e.g. ./build_docs.sh -p)
were not working. This commit fixes this.

This closes #232

This closes #237.

This closes #235.

This closes #204

This closes #213.

This closes #212

This closes #206

This closes #195

This closes #180

  - corrected links to download page
  - corrected download urls
  - corrected wget shortcut for yarn setup
  - corrected links to faq in yarn setup
  - corrected guide for manual yarn build
  - FAQ layout