rework account home to support globbing patterns

rework and fix behavior of c567b1012b80cbd23d2aeeb7b71e018ac99b948f

- now supports `.` (dot) or `~` (tilde) as a current account in Swift URLs
- now the expansion happens earlier and the globbing patterns work with it, i.e. `swift://~/c/obj*` will be correctly handled
Merge pull request #44 from pkit/account_home

rework account home to support globbing patterns
readme: add build status icon
readme: mention tested Python version
Merge pull request #45 from mgeisler/readme

Small readme updates