to itself so a selective receive can be used to retrieve it

fixes #547

add relup to readme and shell completitions

Upgrade relx and add relup provider

Conflicts:
	src/rebar_file_utils.erl

Test required `touch` utility to present on user's machine. Remove this dependency.

Seed random with erlang:now() because os:timestamp precision is not enough
on windows.

Test required `touch` utility to present on user's machine. Remove this dependency.

Seed random with erlang:now() because os:timestamp precision is not enough
on windows.

error message when no plugin is passed to plugins upgrade and global upgrade

More tests

The test works by using a parse transform that stamps modules with an
attribute as it runs them. It then compiles everything, loads the
module, and makes sure the stamps respect the defined order.

install_plugins in rebar_prv_as:do

error message for bad profile config, fixes #539

fix for overrides in plugins, simpler plugin state handling

print sorted list of packages

Updates some deps, moves to packages for deps and adds dialyzer profile

update readme and completions for new commands

Plugins for plugins