[APP] Reword CoinsManager UVP and keywords text

[Fandekasp]

CoinsManager was announced here

Hello dear Crypto users,

We will soon revamp our coming soon page, and we need to update:

• The UVP (Unique Value Proposition): The fastest way to evaluate your currencies
• The keywords and their text: Open Source, Free, Easy to Use, Fast, Secure

We aren't native english (French and Russian), therefore we would really appreciate your suggestions on how to reword them.
Those who come up with the best suggestions will be recorded as our first contributors (send me your pseudo and the email you registered in the newsletter mailing list by PM)

[Fandekasp]

Coming Soon page updated, added navigation links with autoscroll.

I'll update the texts within 24 hours