Use the config_file as the starting point for repo discovery

Author: tiennou

lib/docurium.rb

@@ -23,7 +23,7 @@ def initialize(config_file, repo = nil)
     raise "You need to specify a config file" if !config_file
     raise "You need to specify a valid config file" if !valid_config(config_file)
     @sigs = {}
-    @repo = repo || Rugged::Repository.discover('.')
+    @repo = repo || Rugged::Repository.discover(config_file)
   end
 
   def init_data(version = 'HEAD')

test/gen_test.rb

@@ -12,7 +12,7 @@ def test_read_generated_file
       Docurium::CLI.gen(file.path)
     end
 
-      Docurium.new file.path
+    assert_raises(Rugged::RepositoryError) { Docurium.new file.path }
   end
 
 end