Turn on warnings for spec task.
Fix 'assigned but unused variable' warnings in lib.
Fix 'assigned but unused variable' warnings in spec.
Merge pull request #88 from mvz/no-warnings

Fix warnings
dev: fix ruby-debug version (and deps) for 1.9.2
changelog for #88
changelog tweaks
changelog
bump to 2.8.0.rc1
update License and/or authors in gemspec
update email addy and homepage in gemspec
only extend Object and Class once
move overview to Readme (where it belongs)
eliminate warning
rdoc
rename file to match module name
more README
fix changelog formatting
dev: hack the Gemfile to print instructions for ruby-debug-base19 and linecache19 on ruby-1.9.3
ci: don't warn about ruby-debug-base19 and linecache19 in ci