Modarchive.org download and clean up

Scripts for downloading and sorting Scene music from http://modarchive.org
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A) Requirements:

    - lynx - for making query to the web page in an easy way
    - wget - for downloading the music files
    - 7z   - for repacking the music files for smaller size
    - openmpt123 - for modules playback (best module player)

B) Brief description of the scripts:

1) get_modarchive_mods.sh - https://pastebin.com/RZ1BKDy9

Gets the first (or many) page(s) of favorite results and download it in the
../Downloaded folder. This also creates "downloaded" list with the
genre information (used to skip already downloaded files).

- if ran without parameter it gets next page of results.
- if ran with number then it gets the specific page of the results
- if ran with two numbers then it gets modules from first specified
  page parameter to the last specified.

2) sort_by_genre.sh - https://pastebin.com/PZGHxSC8

You can sort downloaded modules by genre.

3) mod_cleanup.sh - https://pastebin.com/WzHS7t7m

Allows to play module one by one and afterwards decide to keep or
delete it. If Keep is choosen then it stores the module in the
directory by genre or shows genre selection in case genre is unknown.

Script create entry in deleted file in order not to download the file
which was deleted intentionally.

4) mods_down - https://pastebin.com/3s4EHiNL

Simple script for runnung the mod_cleanup.sh script from Dmenu.

5) find_duplicates.pl - https://pastebin.com/e7WUBaWn

Search for duplicates inside packed module files and displays the list
with marked duplicates.