Add top-level license file

license.md

@@ -0,0 +1,17 @@
+# Project license
+
+All parts of this project are openly available, subject to different licenses:
+
+* The `lab.js` **core library** that is included in your studies is made
+  available under the terms of the [Apache License](/packages/library/license).
+* The **builder**, the graphical interface used to build experiments,
+  is provided under the terms of the [GNU Affero General Public
+  License](/packages/builder/license).
+
+Please review the license files linked above for a detailed, legal definition
+of their terms.
+
+The studies you build based on the library, and those you create using the
+builder, are always your own, and you are free to distribute them as you see
+fit. When studies include the core library files, these files alone are governed
+by the aforementioned license.

readme.md

@@ -127,13 +127,13 @@ We [kindly request](https://www.youtube.com/watch?v=kVwl-Va7cNM) that you cite
 
 ### License
 
-The two parts of this project are licensed individually:
+All parts of this project are open source, subject to different licenses:
 
 * The `lab.js` **core library** that is included in your studies is made
-  available under the terms of the [Apache License](/library/license).
+  available under the terms of the [Apache License](/packages/library/license).
 * The **builder**, the graphical interface used to build experiments,
   is provided under the terms of the [GNU Affero General Public
-  License](/builder/license).
+  License](/packages/builder/license).
 
 The studies you build based on the library, and those you create using the
 builder, are always your own, and you are free to distribute them as you see