rebar_core: fix sub dir association

Update rebar repo urls

Change simplenode template files to work on more platforms

Support reading mustache 'lists' from files

Implement 'rebar help CMD1 CMD2' and extend common 'rebar help' msg

This commit add support for reading mustache 'lists' from files, so you
can use the list section functionality when templating things.

An example of the list syntax is as follows:

{package_commands, {list, [[{name, "riak"}], [{name, "riak-admin"}], [{name, "search-cmd"}]]}}.

Then you can, for each of the list elements, render some text:

{{#package_commands}}
chmod +x bin/{{name}}
{{/package_commands}}

* Allow the following predefined analyses :
   undefined_function_calls, undefined_functions, locals_not_used,
   exports_not_used, deprecated_function_calls, deprecated_functions

* Trap some possible errors in case module information is not
    available

* ignore_xref works on all checks and can take {M,F,A} tuples.
  (Automatic behaviour export suppression still only works on
  exports_not_used)

When developing Riak, we have found bugs and other issues due
to the number of platforms we support.

Here is an overview of the changes:
  -  Fix command-line syntax for commands to work on *BSD / Sun
  -  Add chkconfig and getpid to nodetool
  -  Replace platform specific 'kill' commands with a nodetool
	getpid method
  -  Fix RUNNER_USER settings to work on *BSD

Running tests on windows creates false positive due to setup failures
not executing all tests.  Checking for tmp_dir was failing on
subsequent runs.  Added cases to tmp_dir creation to delete preexisting
tmp_dirs in .eunit directory.

* allow plugins to print help message for implemented commands
* append core rebar.config options to common 'rebar help' message

Fix basho/rebar/issues/286

One could argue that rebar_eunit does some pretty dangerous stuff when
trying to clean up after a test run, but specifically, it tells the
Application Controller to delete everything returned by
application:get_all_env(App). Unfortunately, included_applications
also goes, which can lead to a crash in application_controller, if
the application is subsequently unloaded.

This patch attempts the smallest possible fix: remove all env
variables except included_applications.

`systools:make_relup/4` fails with `{missing_param, registered}`
without a `registered` value.

Support environment vars with unicode characters

Add missing variables

- add overlay_vars=, target_dir=, and tests= with short description

bash-completion: add missing options and variables

- add missing short and long options
- add tests=, target_dir=, overlay_vars=

zsh-completion: add 'dump_spec' back again

bash-completion: add dump_spec=1

rebar.config.sample: fix escript_emu_args sample

Makefile: fix 'clean' and add 'distclean'

Change zsh completion script

bash-completion: add generate-appups

* fix 'clean' to remove .eunit (not .test)
* add 'distclean' to also remove deps/

Update THANKS: use my real name

Fixes

Add missing clean/2

The results returned by os:getenv() may contain unicode characters.
That said, we need to explicitly allow unicode when splitting the
environment information, otherwise badarg will be raised causing all
rebar commands to fail until the environment variable is removed.

Normally, Rebar runs eunit tests in the order the beam files are
stored in the file system (see rebar_utils:beams).  However, sometimes
it is desirable to run the tests in a different order (e.g. to
reproduce an error found on a build server).  For that case, it would
make sense to use the 'suites' parameter not just for selecting which
modules to consider, but also for choosing the order.