alpaca shell crashe on an empty project

[Licenser]

1. create a new rebar3 project
2. add the content of https://github.com/alpaca-lang/alpaca#tldr-how-do-i-use-it to the rebar.config
3. run rebar3 alpaca shell

crash:

rebar3 alpaca shell
===> Verifying dependencies...
===> Compiling alptest
Erlang/OTP 19 [erts-8.3] [source] [64-bit] [smp:8:8] [async-threads:0] [hipe] [kernel-poll:false] [dtrace]

*** ERROR: Shell process terminated! (^G to start new job) ***
2017-06-12 00:56:56 Error in process ~p with exit value:~n~p~n
	<0.275.0>
	{{badmatch,{error,[{alpaca_error_format,nofile},{alpaca_ast,nofile},{alpaca_compiled_po,nofile}]}},[{alpaca_shell,ensure_alpaca,0,[{file,"/Users/heinz/Projects/Other/alptest/_build/default/plugins/apcshell/src/alpaca_shell.erl"},{line,322}]},{alpaca_shell,server,0,[{file,"/Users/heinz/Projects/Other/alptest/_build/default/plugins/apcshell/src/alpaca_shell.erl"},{line,22}]}]}

[lepoetemaudit]

Alpaca Shell is undergoing a large rewrite and the current master is almost certainly broken - see the big warning here :) https://github.com/lepoetemaudit/alpaca-repl

Not very helpful that it's broken against the current master here so I apologise for that, but it wasn't in a very usable state anyway. Things are massively changing in the way this plugin will be used - see #12 - so in future versions should be tagged and there will be few (hopefully no!) breaking changesa

[Licenser]

No problem at all! I don't urgently need it I just went through the things and made a issue out of anything that seemed off ^.^ it's awesome work and I figured the least I can do is make issues to help :D