Merge pull request #13 from alexander-zimmermann/master

Changes in optparser
Merge pull request #14 from alexander-zimmermann/master

Some straight forward coding style changes
Merge pull request #15 from alexander-zimmermann/master

char doAnderson is no longer needed
Merge pull request #16 from alexander-zimmermann/master

This series of patches changes flowgrind's timer management to achieve a nanosecond precision