Rename all the specs because it's too hard to manage the paths correctly

(aka, what does "require 'engine'" pull in?)

Rakefile

@@ -78,7 +78,7 @@ end
 
 desc "Run specifications"
 Spec::Rake::SpecTask.new("spec") do |t|
-	t.spec_files = FileList['spec/**/*.rb']
+	t.spec_files = FileList['spec/**/spec_*.rb']
 end
 
 desc "Run Heckle on tests"

build/config.rb.erb

@@ -16,11 +16,16 @@ unless defined? $CONFIG_INCLUDED and $CONFIG_INCLUDED
 	# will sometimes cause us to end up with duplicates (i.e. 'test/../lib' and 
 	# 'lib'), and this confuses 'require' and gives us weird errors
 	def path_add(path)
-		real_path = Pathname.new(path).realpath
-		$:.unshift real_path.to_s unless $:.include? real_path
+		real_path = Pathname.new(path).realpath.to_s
+		$:.unshift real_path unless $:.include? real_path
 		path_filter
 	end
 
+	def path_remove(path)
+		real_path = Pathname.new(path).realpath.to_s
+		$:.delete_if {|x| Pathname.new(x).realpath.to_s == real_path}
+	end
+
 	def path_filter
 		tmp = $:.collect do |x| 
 			begin Pathname.new(x).realpath.to_s rescue '' end