Removed tests that are already in hPDB-examples.
HLint cleanup, removed old source files.
First try at INSTALL instructions.
Use Posix/Windows portable mmap library instead of bytestring-mmap.
text-format now optional, only using version >= 0.3.1.0
Using FilePath in external interface for parsing and writing.
Cleaned up unused files.
Bump version number.
Better links from README.md.