first pass at 'wp super-admin' commmand
pass allow-root along in launch_self()

fixes #997
bump version to 0.14.1-alpha
Add `wp role reset` - resets any given default role to default capabilities
formatting cleanup
switch instead of ifs
global not needed in command
Reset without hard-coded list of caps. Add reset all option
remove commented debug line and unnecessary sprintf
reset multiple roles at once
change `wp role reset all` to `wp role reset --all`
compare before/after roles to determine success
wp user create: validate fields before calling wp_insert_user()

see #358
wp core install: validate admin email

closes #358
bump minimum required WP version to 3.5.2
Merge pull request #1004 from wp-cli/wp-3.5

Bump the minimum supported version of WordPress to 3.5
wp media regenerate: check if there is platform support for generating images before starting
check for platform support before calling 'wp media import' too
Merge pull request #1003 from wp-cli/img-ext-check

Check that php-gd or php-imagick is available, before calling `wp media regenerate`
support arbitrary command nesting
prevent registering subcommands for concrete commands
Merge pull request #1005 from wp-cli/fourth-level

Support arbitrary command nesting