Merge pull request #4 from jimhester/xxHash

Add tests for xxhash
remove two spurious semicolons found by R CMD check
updated GNU copyright header
small edits for manual pages
updated reference output for tests
added by RStudio project
updated Changelog; bumped dev version, updated date
converted to four spaces indentation
reindented to four spaces; added GPL header
reindented to four spaces
reindented to four spaces; added GPL header
updated changelog, edited DESCRIPTION, bumped Version
use explicit symbol identifiers

- in useDynLib in NAMESPACE, declare the indetifiers
- in all .Call calls use them as identifiers (and not quoted)
release 0.6.5

- also bump date
- update ChangeLog
minor standardization done a while back and not yet committed
attempt to suppress an issue with long long on Windows

this has a side-effect to be sorted out
bump minor version and date
Use portable printf with inttypes.h
Merge pull request #5 from jimhester/printf

Use portable printf with inttypes.h
minor cosmetics