Page completed
Docs for 'groovysh'
   * removed problematic "tools" subdirectory
   * added assets for screenshots
   * backport from wiki
   * added missing docs for 'doc' and 'register' commands
Docs for 'groovysh': Add missing images
GROOVY-6268: Fix title levels
GROOVY-6268: Documentation for Groovy Console
Remove row from table

--classpath is already specified as the long version of -cp earlier in the table.  This change treats --classpath the same as the rest of the long version switches farther down the table.
minor wording change, s/compilation/compiler
Merge pull request #231 from jeffbrown/joint_compilation

Joint compilation
clarify -classpath vs. --classpath
Merge pull request #230 from jeffbrown/groovyc_classpath_switch

Clarification of -classpath vs --classpath
updated groovy dependency in maven maven-antrun-plugin example
Merge pull request #222 from bura/doc-version-scheme

New page "Version Scheme" added
minimal correction of next bugfix version example
added Andrey Bloschetsov and Jeff Scott Brown as contributors