Implements wp term generate, Fixes #389.
Conflicts resolved.
Added Behat tests for term generate command
Merge remote-tracking branch 'upstream/master'
Taxonomy no longer has a default value for term generate
Term generate no longer makes redundant DB query for existing terms
Updated term generate test with new required parameter
core caching on download
core download caching tests
Merge pull request #957 from francescolaffi/pr-cache-core

Core packages caching
Merge pull request #821 from Japh/master

Implements wp term generate, Fixes #389.
make 'wp term delete' accept multiple args
improve hierarchy generation; see #821
make all the term subcommands accept the taxonomy as the first parameter
Unset possible ID column to prevent unwanted behaviour

If the ID column isn't unset, then `wp_insert_user` will return this ID while not having created a new user. Therefor passing the `is_wp_error` check and showing the success message without actually having created a new user.
Merge pull request #962 from wp-cli/term-arg-order

Make the taxonomy the first parameter for all term subcommands
Merge pull request #961 from wp-cli/import-users-with-id-column

wp user import-csv users.csv with ID column
slight improvement to behat step regex
Update WordPress stable in Travis CI template

The 3.6 times are gone.
Merge pull request #965 from nb/update-latest-stable-in-travis-ci

Update WordPress stable in Travis CI template