Update semantics of what the "timezone" parameter actually is in this
context to make room for the actual timezone configuration.

Update the pip3 commands to instead use the safer "python3 -m pip"
method as some distros do not install pip3 as part of the python3-pip
install (but calling the pip module using python3 is almost a
guaranteed).

Few updates to files for formatting consistency (aesthetics).

PHP/libgfortran: Support Debian Stretch

Add ISS reception and decoding support

This reverts commit 5f7cab93e0.

Added GAIN variable