xib and git log tools
xib: Scrolling of output pane
xib_gitshow: Show diffstat
xib: Bugfix
xib: Only run command if another item has been selected
xib: Scroll half pages
xib: Page scrolling in external output
xib: Explain keys with control modifier
xib: Add vi-like tilde lines
xib: Do not use expandtabs

This can't work because "item" may include escape sequences which Python
doesn't account for.
xib: Fix comment
xib: Properly catch stderr and fatal errors