Fix typos in public header file and README.
Allow Clang build to fail.
Merge pull request #6 from martin-helmich/issues/disable-clang-build

Allow Clang build to fail.
Fix linking issues with g++.
Merge pull request #7 from martin-helmich/issues/cpp-linking

Fix linking issues with g++.
Merge pull request #8 from acolomb/fix-typos

Fix typos in public header file and README.