py3status v0.7

Some cool bugfixes happened since v0.5 and py3status broke the 20 github stars, I hope people are enjoying it.

changelog

• clear the user class cache when receiving SIGUSR1
• specify default folder for user defined classes
• fix time transformation thx to @Lujeni
• add Pingdom checks latency example module
• fix issue #2 reported by @Detegr which caused the clock to drift on some use cases