Include tests in tarball

• Tests now included in dist tarball for "make test"
• Test script now runs on Mac OS X

Range bug fix and Mac OS X fix

• Fixed bugs parsing some ranges.
• Added getline implementation using fgetln to hopefully fix Mac OS X 10.6.8 compilation.

pk - Initial release

pk is a command line utility for easily extracting columns from text.

Initial version supports:

• variable delimiters
• fixed file formats
• CSV
• quoted fields
• escaped delimiters