Move templates to directly under libs/ (#303)

libs/blocksprj/pxt.json

@@ -1,8 +1,8 @@
 {
     "name": "{0} block",
     "dependencies": {
-        "core": "*",
-        "radio": "*"
+        "core": "file:../core",
+        "radio": "file:../radio"
     },
     "description": "",
     "files": [

libs/bluetoothprj/pxt.json

@@ -1,8 +1,8 @@
 {
     "name": "{0} block",
     "dependencies": {
-        "core": "*",
-        "bluetooth": "*"
+        "core": "file:../core",
+        "bluetooth": "file:../bluetooth"
     },
     "description": "",
     "files": [

libs/tsprj/pxt.json

@@ -1,8 +1,8 @@
 {
     "name": "{0} bit",
     "dependencies": {
-        "core": "*",
-        "radio": "*"
+        "core": "file:../core",
+        "radio": "file:../radio"
     },
     "description": "",
     "files": [