feat(osgi): explicit dependency on JavaSE-1.7 instead of 1.6
Adds preferences for REPL history.

* Preference for REPL history size.
* Preference for REPL history persistence schedule.
doc(repl history): document repl history options in changelog
style(repl launch): renamed repl launch labels to adopt eclipse convention
doc(asciidoc): completed keyboard-shortcuts page
fix(wizard): new ns wizard displays trailing . if needed and cursor is now at the end of text
feat(repl): REPL auto-disables when connection lost
chore(mvn): Release of version 0.26.0
chore(mvn): Upgraded version number to 0.26.1-SNAPSHOT
Update CONTRIBUTING.adoc mvn install -> mvn verify
fix(mvn): Update Eclipse Color Theme version
feat(classpath): Download sources jar for dependencies
doc(classpath-container): explanation of (take 2 dep)
fix(lein): don't activate lein handlers in wrong places

Fix Issue 642
feat(debug cljx): accept breakpoints
fix(debug): breakpoints in clj files works when launched with leiningen
fix(debugger): make breakpoint specific on filepath, not just filename

Fix Issue 273:	debugger breaks in wrong place if files have same name
refactor(debug): more logical placement of methods
refactor(debug): remove unnecessary code

- ClojureSourceLookupDirector
- ClojureSourceLookupParticipant
- ClojureSourceContainer
fix(product): Preferences > General > Appearance was throwing an exception

Fixes Issue #646