Touch Natural Numbers

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v.1.0.6 r7 Dragging of prime tokens: fixed.
v.1.0.5 r6 Urgent update (after long time) Frontpage, erased. Improved list of prime numbers access.
v.1.0.4 r5 Recompiled Marshmallow. (API 23) with exit, and list of primes ever available.
v.1.0.3 r4 Recompiled with API 22 No changes.
v.1.0.2 number as a sum of 3 primes only works under 2000
v.1.0.1 improved last activity (edit and info), and cleaned the whole project.