Suggested polish for weberp.org

[dalers]

Imho the description for the PDF Users Manual would be better being less personal and more the product of the webERP project instead of me personally.

I then found myself heading down a rabbit's hole simplifying text, clarifying button legends, fixing punctuation, tightening headers, etc, including changing the "Downloads" button to "Code" since the manual is also a "Download" and created a new "Social Media" section on the home page with clickable links.

Here's the look of the home page after editing. Imho the look is cleaner and easier to read, but beauty is in the eye of the beholder. I will submit a PR with all my suggested changes (including changes to the Features, Developers (Development), and Manual (Documentation) pages).