Fixes #114: autojump suppresses the error message caused by 'j --help'.
#114: Error message when directory does not exist or not in autojump database.
First version of argparse implemented
Fixes #113, #115, refactor autojump to use argparse over optparse.
Fix default autojump behavior when run with 0 arguments.
Fixes #112, fixes #116. Simplify documentation build.

Documentation is now generated through Pandoc by running ./make_doc.sh.

Man page is generated from manpage.md, while INSTALL.md + manpage.md =
README.md.
Update documentation, particularly how to prefer symbolic links or change
directory weights within the database.
minor documentation update in preparation for release-v20
version numbering
Modify documentation to notify that minimum Python version is 2.7 instead of
2.6.

This was caused by the rewrite to use argparse over optparse to handle command
line arguments.
update documentation with known issues (i.e. long standing bugs)
ran make_doc.sh
Macports command instead of link to Portfile
remove leftover syntax when docs were in ReST format
Documentation update provides Mac Ports command for install.
Update documentation and install scripts to reflect new minimum Python requirements.

Documentation and install scripts now instruct older Python users to upgrade
their Python version or install older versions of autojump.

'install.sh' now gets a -f|--force option, which makes the install ignore
Python dependency requirements.
Remove unicode string parsing in argument handling

Defining argument strings explicitly as unicode causes problems in Python v3,
and the arguments are tested anyway in encode and decode functions.
reformat changelog
restructure files, working make doc and make release
fix install.sh to reflect new locations, tweak documentation where necessary