XD-268: Some cleanup in options management

Fix local banner display

Actual XD-262: Converted existing code to Spring MVC. Needs Content-Type: text/plain to work as before though, will update doc accordingly if merged

Removing unused argument.

Added copyright headers to new files
Simple test infrastructure, testing http codes atm
Fixing merge conflict that went unnoticed
Fix build file formatting
Undo commit of log4j config
XD-144: Leave log4j.properties out of jar files

Added exclude to gradle jar task.
XD-294 Apply JavaDoc HotFix; Fix JavaDocs

Apply hotfix plugin; remove javadoc warnings.
Merge pull request #73 from garyrussell/XD-294

* garyrussell-XD-294:
  XD-294 Apply JavaDoc HotFix; Fix JavaDocs
XD-226 - Cleanup build.gradle

* Align build.gradle more with Spring Integration / Core Spring Framework build file
* Copy distribution (distXD) to build/dist
* Enable all compiler warning
* Provide external JavaDoc API links
* Convert spaces to tabs
Move StreamPlugin to a dedicated package
XD-142 Fix early instantiation of beans in module context

- Remove StreamPlugin usage of Module.getComponents
causing bean instantiation before module start

- Add hook for Plugins to add shared bean definitions
to the common context

- Add post processors for modules to register their
own channels with the ChannelRegistry

- Add context destroy to Module stop, as context
cannot be re-refreshed on start anyway
XD-142 Add stream deploy integration test