Ability to use a Path; More Tests

When making the object, you can now use a path to a file instead
of just a string containing URL. Also, more tests.

.gitignore

@@ -0,0 +1,4 @@
+*.moarvm
+*.swp
+lib/.precomp/
+.precomp/

README.md

@@ -8,7 +8,13 @@ The idea is to make this module as simple to use as possible.
 ###`.new`
 The `.new` method will require an 'incoming webhook' integration link from Slack, this way it knows where to connect and has the correct authentication to do so. One of these links will be given after setting up an integration using [this link](https://my.slack.com/services/new/incoming-webhook/ "New Slack incoming webhook"). If the url is not given an exception will be thrown. The syntax for this will look like this:
 ```
-my $slack = WebService::Slack::webhook.new($url);
+#String containing the URL.
+my $slack = WebService::Slack::webhook.new(url => "$url");
+
+#Or...
+
+#Path to a file with the URL.
+my $slack = WebService::Slack::webhook.new(path => "/path/to/file");
 ```
 
 ###`.send`

t/02-make.t

@@ -0,0 +1,29 @@
+#!/usr/bin/env perl6
+
+use Test;
+use lib 'lib';
+
+use WebService::Slack::webhook;
+
+#Make some vars
+my $fake-url = "https://host.slack.com/example";
+my $file-name = ".slackurl";
+
+#Make a bad object.
+dies-ok {WebService::Slack::webhook.new()},
+    'Bad object fails correctly';
+
+#Make a good object with a url.
+isa-ok WebService::Slack::webhook.new(url => "$fake-url"),
+    'WebService::Slack::webhook',
+    'Good object can be made with url';
+
+#Make a good object with a path.
+"$file-name".IO.spurt($fake-url); #Make the file.
+isa-ok WebService::Slack::webhook.new(path => "$file-name"),
+    'WebService::Slack::webhook',
+    'Good object can be made with path';
+"$file-name".IO.unlink; #Remove the file.
+
+
+done-testing;