Bugfix and Improvements

[X] Bugfix: station ordered by net, sta
[X] Bugfix: s03 -> remove explicit MSEED
[X] Bugfix: database_tools: add gps2DistAzimuth import
[X] Bugfix: s07 -> left, right are now defined from the first plot
[X] Improvement: Add support for manual DB.ini path
[X] Improvement: Cleaner s07 plot script
[X] Improvement: s03: add taper to each slice before FFT in whiten
[X] Improvement: s01: add headonly=True arg to the read function, should make the archive scan faster
[X] Minor Documentation update