introduce primative testcases for new builder docs
Merge branch 'master' of https://github.com/jnorthr/groovy-core
chg module name to avoid namespace collision
GROOVY-6966: Type cast methods for Collection classes.
add Builder topic to my list to be documented
jcenter switched to ssl
Add 'Server' keyword to title

add this keyword for better searches by external tools
GROOVY-3457: Preparing for addition of new StreamingTeamplateEngine

o Enabling selective suppression of specific checkstyle rules for specific code
o Enabling the spock unit testing framework for the groovy-templates subproject
GROOVY-3457: Adding new StreamingTemplateEngine to address >64k issues

As per the issue, the current template engine implementations throw
exceptions for data > 64k. Code ported from a separate github repo at:

https://github.com/mbjarland/groovy-streaming-template-engine
add groovy-contribution images
GROOVY-6824: StreamingJsonBuilder rewrited
add hot-to-contribute tutorial
Updated IO to explicitly implement Closeable

It has a close() throws IOException already, so might as well have it sign that contract.
change 1.5.0 reference into 1.4.0

fix spelling mistake
add link between core index.adoc and groovy-contributions
 Merge branch 'contributions' of https://github.com/jnorthr/groovy-core into contributions
fix typos in groovy-contributions
update title
GROOVY-7134: Add @SelfType annotation for traits
GROOVY-7134: Make sure "this" can be used in the context of a self type