typos, removed unused imports, type inference
Merge remote-tracking branch 'origin/master' into wrk

Conflicts:
	vertx-core/src/main/java/org/vertx/java/core/http/HttpServerResponse.java
upgraded netty version to fix ssl issues
added contributing guide
Update CONTRIBUTING.md
Update CONTRIBUTING.md
Fix test so it reflect correct behaviour of websockets. This was wrong because of a earlier bug in netty
Allow resolving of modules with -mod suffix
changed some mods to have new suffix
https://github.com/vert-x/vert.x/issues/656
[#648] Allow to write a Buffer multiple times
Merge pull request #649 from matasaru/master

typos and other little pedantries
Remove UnreleasableByteBuf as netty provides the same now
inced release
Upgrade to Netty 4.0.0.CR7
[#665] Make sure keepalive setting is used for Clients
inced netty version plus removed system.out.println
[#666] Correctly handle attributes on form upload to not include redundant name attributes
Revert "[#666] Correctly handle attributes on form upload to not include redundant name attributes"

This reverts commit 805859a9aa396b2f12dc99753dbc06cc4dd954a0.
[#666] Correctly handle attributes on form upload to not include redundant name attributes