Cleaner tutorial asset stuff

.gitignore

@@ -7,5 +7,4 @@
 
 intro-to-crafty/lib/crafty.js
 intro-to-crafty/assets/*
-intro-to-crafty/crafty_bng_tut_assets*
-__MACOSX
+intro-to-crafty/tmp/*

intro-to-crafty/Makefile

@@ -1,5 +1,5 @@
-INTRO_ASSETS_ZIP := crafty_bng_tut_assets.zip
-INTRO_ASSETS_EXTRACTED_README := crafty_bng_tut_assets/README
+INTRO_ASSETS_ZIP := tmp/crafty_bng_tut_assets.zip
+INTRO_ASSETS_EXTRACTED_README := tmp/crafty_bng_tut_assets/README
 
 .PHONY: all
 all: lib/crafty.js assets/README
@@ -12,11 +12,12 @@ lib/crafty.js:
 	curl -sSL -o $@ http://craftyjs.com/release/0.5.3/crafty.js
 
 assets/README: $(INTRO_ASSETS_EXTRACTED_README)
-	rsync -av $(dir $(INTRO_ASSETS_EXTRACTED_README))/ assets/
+	rsync -av $(dir $(INTRO_ASSETS_EXTRACTED_README)) assets/
 
 $(INTRO_ASSETS_EXTRACTED_README): $(INTRO_ASSETS_ZIP)
-	unzip $(INTRO_ASSETS_ZIP)
-	find $(dir $(INTRO_ASSETS_EXTRACTED_README)) -type f | xargs touch
+	cd tmp && \
+	unzip -o $(notdir $(INTRO_ASSETS_ZIP)) && \
+	find . -type f | xargs touch
 
 $(INTRO_ASSETS_ZIP):
 	curl -sSL -o $@ http://buildnewgames.com/assets/article//introduction-to-crafty/crafty_bng_tut_assets.zip