fix: Help page polishing + fixing pictures

Add information about the singular form of GeoKrety and make info about trading them a bit clearer.

Update "Make your own GeoKrety"

Improve language and make punctuation more consistent.

Update "GeoKrety types"

Fix some language issues, make punctuation consistent

Update  KretyPost rules

Update language, make punctuation consistent.

Update Log types

Update the language a bit and make capitalisation consistent.

Update Fully supported waypoints

Remove links to websites that don't exist anymore.
(i.e.:
- http://www.opencaching.se/
- http://www.opencaching.cz/
- http://www.gpsgames.org/
- http://geocaching.plus.ro/
- http://wpg.alleycat.pl/
- https://www.navicache.com/ )

Also removed the logos these dead websites, changed "NL database" to the more exact "BeNeLux database"

Add files via upload

Screenshot of the GTK menu on a cache page on geocaching.com

Begin to update How to log dropping to geocaching.com cache?

Fix language to be more clear, update link to the Chrome plug-in, begin adding new screenshots. Still to do:

- Add info about c:geo
- Add new screenshots with the current geocaching and geokrety website.

Update help.html

Add a section about c:geo for logging GeoKrety and update the screenshot for manually logging a GeoKret on geocaching.com

Update The iconology

Make capitalisation and punctuation more consistent.

Update Reference Number and Tracking Code

Improve language  a bit to make information clearer.

Update section "Reference Number and Tracking Code"

Change to "4 to 5 digits"

Author: bammerlaan