Bump to alpha-5

Changelog since alpha-4:

- rebar3 now bootstraps itself
- app compile fixes on app info contents and config inheritance
- dropping ErlyDTL and going to Mustache for smaller executable sizes
  and faster load time on small CPUs
- dropping `erlydtl compile` command, ErlyDTL task moved to a plugin
- default dependencies are always fetched in the right place and don't
  need to be copied across profile runs
- escriptize fixes
- `unlock` command added
- resolving/avoiding clashes when a rebar3 dep and an application
  dependency conflict together
- profile deduplication (`rebar3 as test,test,prod,test eunit` returns
  the profile/directories for `prod+test`)
- `upgrade` command bugfixes to recognize promotion of transient deps to
  top-level deps
- support template when rebar3 is run as an embedded library
- some optimizations
- parse transform support is better in erl_opts
- fixes to package handling
- fixes to `rebar3 deps`

README.md

@@ -13,7 +13,7 @@ configuration work. rebar also provides dependency management, enabling
 application writers to easily re-use common libraries from a variety of
 locations (git, hg, etc).
 
-3.0 Alpha-4
+3.0 Alpha-5
 ====
 
 [DOCUMENTATION](http://www.rebar3.org/v3.0/docs)
@@ -44,6 +44,7 @@ limit scope.
 | new        | Create new rebar project from templates |
 | pkgs       | List available packages |
 | release    | Build release of project |
+| report     | Report on environment and versions for bug reports |
 | shell      | Run shell with project apps in path |
 | tar        | Package release into tarball |
 | update     | Update package index |

src/rebar.app.src

@@ -3,7 +3,7 @@
 
 {application, rebar,
  [{description, "Rebar: Erlang Build Tool"},
-  {vsn, "3.0.0-alpha-4"},
+  {vsn, "3.0.0-alpha-5"},
   {modules, []},
   {registered, []},
   {applications, [kernel,