Delete "__pycache__" directories in the package pre install and post remove scripts (#412)
Delete "__pycache__" directories in the package pre install and post remove scripts (#412)

* Make sure variable type is unicode otherwise log formatter will fail
because of mixing str / bytes and unicode.

* Make sure input string is unicode not bytes.

* Make sure we also remove __pycache__ directories in our install scripts.

scalyr/scalyr-agent-2,scalyr/scalyr-agent-2,scalyr/scalyr-agent-2,scalyr/scalyr-agent-2,imron/scalyr-agent-2