Add README.md.

README.md

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+# ntl
+
+[NTL](https://libntl.org/) is a high-performance, portable C++ library
+providing data structures and algorithms for arbitrary length integers; for
+vectors, matrices, and polynomials over the integers and over finite fields;
+and for arbitrary precision floating point arithmetic.
+
+NTL provides high quality implementations of state-of-the-art algorithms for:
+* arbitrary length integer arithmetic and arbitrary precision floating point
+  arithmetic;
+* polynomial arithmetic over the integers and finite fields including basic
+  arithmetic, polynomial factorization, irreducibility testing, computation of
+  minimal polynomials, traces, norms, and more;
+* lattice basis reduction, including very robust and fast implementations of
+  Schnorr-Euchner, block Korkin-Zolotarev reduction, and the new
+  Schnorr-Horner pruning heuristic for block Korkin-Zolotarev;
+* basic linear algebra over the integers, finite fields, and arbitrary
+  precision floating point numbers.

ntl.rpmlintrc

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-# THIS FILE IS FOR WHITELISTING RPMLINT ERRORS AND WARNINGS IN TASKOTRON
-# https://fedoraproject.org/wiki/Taskotron/Tasks/dist.rpmlint#Whitelisting_errors
-
-# The dictionary is missing some technical terms
-addFilter(r'W: spelling-error .* irreducibility')
-
-# The configure script is not generated by autotools
-addFilter(r'ntl.spec:[^:]+: W: configure-without-libdir-spec')