Only use all.equal if identical is FALSE.
Closes #165
Renable random praise. Closes #164
Upgrade roxygen
Move methods to depends. Closes #123
Merge pull request #163 from krlmlr/union-merge

use union merge driver for NEWS.md
Merge remote-tracking branch 'hadley/master' into 159-mocking
use only ... arguments: named arguments are mocked, unnamed arguments are evaluated
no-op mocking gives a warning
evaluate expressions in parent frame to be able to access variables defined there
extract function get_mocks
allow character names for .env argument
rename function get_mocks to extract_mocks
extract functions set_mock and reset_mock