Something patchy

This is a bugfixing release. No new features are introduced.

A list of fixes:

• Remove debug output (#126)
• Paths with spaces on dash
• Custom names for .env (#109)
• Usage of double slashes (#125)
• Infinite loop when symlinking across mountpoints (#133)
• Don't allow chdir aliases
• Mountpoint detection (#138 #139)
• No more override of $OLDPWD (#141)
• .env files at mountpoint are now being found (#146)