Add an (yet empty) introduction document
add a small introduction
GROOVY-6227: Delete (not working) Eclipse files from groovy-core git repo
GROOVY-6226 - Configure Gradle Eclipse plugin for groovy-core

Part 3
GROOVY-6226: Configure Gradle Eclipse plugin for groovy-core

Part 4: A few tests still fail if run in Eclipse, everything else seems to work
fix typo
Semantics with an s
Section on identifiers
Merge branch 'master' into rlw-jdk8