add missing OPTIONS header to 'wp db import' docs
first pass at 'wp db tables' command
Merge pull request #1084 from wp-cli/wp-db-tables

Add subcommand for listing database tables
fix handling of --post_category parameter; closes #986
use putenv() instead of relying on Bash inline variables

fixes #1086
Merge pull request #1086 from wp-cli/fix-1086

Cygwin shell doesn't support inline environment variables
wp cache: remove redundant exit calls and use WP_CLI::line()
abort loading if APC object cache is detected

see #283
avoid using wp_using_ext_object_cache() function, which was only introduced in WP 3.7
make search-replace work with tables that have a composite primary key
Merge pull request #1087 from wp-cli/fix-1049

make search-replace work with tables that have a composite primary key
delete all and expired transient commands
Use global _wp_using_ext_object_cache directly for backwards compatibility
Use WordPress current_time instead of PHP time
Pass count rows affected to success message
display different notice if no transients found
oops... pass timestamp to current_time
better message text
Merge pull request #1090 from mattheu/delete-all-transients

Delete all and expired transient commands
Make post id optional in wp comment count