Merge pull request #632 from wp-cli/cpt-post-types-notices-fix

Fix notices undefined index post_types when scaffolding CPT
add array_column() polyfill for PHP<5.5
show warning for invalid synopsis parts
Add capabilities list function for users
Listing each cap on a separate line
colorize update candidates. fixes #638
First test cases in Behat for capability management
introduce WP_CLI_PHP_ARGS environment variable

also, remove old Drush code for looking up php.ini files

fixes #631
Fix search replace reserved column name issues.
Use `wp_parse_args()` where we can
Merge branch 'master' of git://github.com/wp-cli/wp-cli
add regression test for #645
show commands defined in plugins when running 'wp help'
Merge pull request #645 from wp-cli/fix-645

Commands added by plugins aren't listed in `wp help`
add test for #634
option update: use non-strict comparison
Merge pull request #634 from wp-cli/fix-634

Bug: `wp option update blog_public` produces error
bump version to 0.11.1-alpha
Merge pull request #641 from c10b10/master

Fix search replace reserved column name issue
move column escaping down into the table iterator

see #641