set $MANPATH in Bundler::Runtime#setup_environment

This lets `bundle exec man ...` show man pages from bundled gems.
Show that current_release can be overridden.
Sort `bundle outdated` output (as `bundle show`) ; add tests.
Ruby 1.8.7 does not have lookbehind ; fix the regex.
Adds bundle licenses cli task
Issue #2000 Add test for conflict markers in Gemfile.lock
Raise error if Gemfile.lock contains conflict markers, closes #2000
Handle error messages caused by missing binary libraries.
Issue #2000 improve error message
rake:release should guard against both uncommitted and unstaged changes
support setting boolean environment variables

These were previously stored as a string if they are derived from the
environment or configuration files. Rather than altering each of the checks,
we can select a list of settings to convert to boolean values when they are
accessed.
Issue #2000 Improve test for conflict markers in lockfile
Merge remote-tracking branch 'upstream/master' into issue-2000
change to new expect syntax for rspec
backport API timeout spec fixes
Remove trailing whitespace
Merge pull request #2169 from sol/1-2-stable

Remove trailing whitespace
backport @tenderlove's fix for Psych::SyntaxError

only parse specs as YAML if they look like YAML files, otherwise fall back to Ruby evaluation

Fixes #2188
backport smarter psyched yaml
Version 1.2.3 with changelog