Merge pull request #25 from clburlison/master

fix typo in Installation.md
Fix for issues #16 and #24
Pytz is needed
Need to install dependencies when upgrading
Note about errors when upgrading.
Historical Facts added in as per pull request #23. Thanks cabal95!
Documentation on using custom Facts
Note on SQLite
Correct facterlib path
Bump version in makefile
Make PuppetStatus the same width
Get the templates too
Fix for issue #26
Remove docs about SQLite not working
Link to releases page to clarify installation procedure, raised by issue #27
Update docs