Initial import.

LICENSE.txt

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+Copyright © 2012 - 2020, Udacity, Inc.
+
+Udacity hereby grants you a license in and to the Educational Content, including
+but not limited to homework assignments, programming assignments, code samples,
+and other educational materials and tools (as further described in the Udacity
+Terms of Use), subject to, as modified herein, the terms and conditions of the
+Creative Commons Attribution-NonCommercial- NoDerivs 3.0 License located at
+http://creativecommons.org/licenses/by-nc-nd/4.0 and successor locations for
+such license (the "CC License") provided that, in each case, the Educational
+Content is specifically marked as being subject to the CC License.
+
+Udacity expressly defines the following as falling outside the definition of
+"non-commercial":
+(a) the sale or rental of (i) any part of the Educational Content, (ii) any
+    derivative works based at least in part on the Educational Content, or (iii)
+    any collective work that includes any part of the Educational Content;
+(b) the sale of access or a link to any part of the Educational Content without
+    first obtaining informed consent from the buyer (that the buyer is aware
+    that the Educational Content, or such part thereof, is available at the
+    Website free of charge);
+(c) providing training, support, or editorial services that use or reference the
+    Educational Content in exchange for a fee;
+(d) the sale of advertisements, sponsorships, or promotions placed on the
+    Educational Content, or any part thereof, or the sale of advertisements,
+    sponsorships, or promotions on any website or blog containing any part of
+    the Educational Material, including without limitation any "pop-up
+    advertisements";
+(e) the use of Educational Content by a college, university, school, or other
+    educational institution for instruction where tuition is charged; and
+(f) the use of Educational Content by a for-profit corporation or non-profit
+    entity for internal professional development or training.
+
+THE SERVICES AND ONLINE COURSES (INCLUDING ANY CONTENT) ARE PROVIDED "AS IS" AND
+"AS AVAILABLE" WITH NO REPRESENTATIONS OR WARRANTIES OF ANY KIND, EITHER
+EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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+ASSUME TOTAL RESPONSIBILITY AND THE ENTIRE RISK FOR YOUR USE OF THE SERVICES,
+ONLINE COURSES, AND CONTENT. WITHOUT LIMITING THE FOREGOING, WE DO NOT WARRANT
+THAT (A) THE SERVICES, WEBSITES, CONTENT, OR THE ONLINE COURSES WILL MEET YOUR
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+OR THE ONLINE COURSES WILL NOT EXPERIENCE OUTAGES OR OTHERWISE BE UNINTERRUPTED,
+TIMELY, SECURE OR ERROR-FREE, (C) THE INFORMATION OR CONTENT OBTAINED THROUGH
+THE SERVICES, SUCH AS CHAT ROOM SERVICES, WILL BE ACCURATE, COMPLETE, CURRENT,
+ERROR- FREE, COMPLETELY SECURE OR RELIABLE, OR (D) THAT DEFECTS IN OR ON THE
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+INCLUDING DEATH AND DAMAGE TO PERSONAL PROPERTY, SUSTAINED FROM USE OF SERVICES.