fix template listing (re-add escript_incl_extra)

Fixes regression from 3a63bec39f (diff-31d7a50c99c265ca2793c20961b60979L4)
which meant listing templates doesn't work (rebar3 new help)

real bootstrapping

Track code path

Symlink existing default deps when in new profile

Should fix #360

Conflicts:
	test/rebar_profiles_SUITE.erl

Conflicts:
	src/rebar_state.erl

fix erl_first_files to check entire path of file

run project wide pre-compile hooks after deps have compiled

set the dep as the project app before running hooks

don't duplicate hooks for top level app

ignore optional deps for now

add to end of code path not the beginning in handle_deps

Add support for an unlock command

Allows to remove entries from the lock file, or the lock file as a
whole.

Default deps always to the default profile

Mainly CT changes

When fetching dependencies for the first time using a profile (`rebar3
as prod release` or `rebar3 ct`), the dependencies get fetched into the
non-default profile. This has two consequences:

- the files get re-downloaded on follow-up runs
- the lock file includes incomplete or too many deps in its list

This patch forces dependencies in the default profile to be stored in
_build/default/lib even when running under other profiles, then symlinks
them to the correct one.

This makes it so common dependencies in 'default' be downloaded there
and avoids re-downloading them. Should also fix the lock issues.

include applications list in compile sort