v21.5.0: add --increase and --decrease options to manually change weight.
fix some pep 8 issues
fix unit tests to match new decrease calculation
Show database file when printing stats.

Closes #188.
normalize path ending before adding to the DB
Merge pull request #193 from svent/normalize_paths

normalize path ending before adding to the DB
updated autojump.bash, removing export

exporting the prompt seems to be too harsh and breaks the shell in Emacs as the PROMPT_COMMAND for xterm (say) overwrites the 'dumb' PROMPT_COMMAND, which now is 'contaminated' with ASCII escape strings.
Merge pull request #198 from pank/master

Disable export of PROMPT_COMMAND for bash shells.

Not using export means sub shells can't see the env
variable changes, but this shouldn't be an issue since
new sub shells should be sourcing ~/.bashrc anyway.
Updated cygwin code to start file explorer correctly
Updated cygwin code as for autojump.bash
Merge pull request #199 from jostber/master

Updated cygwin code
Syncing with upstream