Add python script to generate the bits needed for the prime generator.

tools/primes.py

+primes = [2, 3, 5, 7]
+safe = True
+
+muliplier = 1
+for p in primes:
+    muliplier *= p
+
+offsets = []
+for x in range(3, muliplier + 3, 2):
+    prime = True
+    for p in primes:
+        if not x % p or (safe and not ((x - 1) / 2) % p):
+            prime = False
+            break
+
+    if prime:
+        offsets.append(x)
+
+print(offsets)
+print(len(offsets))
+print(muliplier)