Add a new enterprise support page for Groonga

[fujimotos]

The information in this page has been a bit old for a while. Let's update it.

• Remove the obsolete information from the page.

• Introduce a new listing view of support companies, including their logos.

With this patch merged. the new service page looks like this:

Signed-off-by: Fujimoto Seiji fujimoto@clear-code.com

[kou]

Could you mention license information of ClearCode's logo?

https://github.com/clear-code/resources

[fujimotos]

• Logo attribution text: added.
• Links to mroonga/pgroonga: added.

[fujimotos]

Now it looks like this:

[kou]

Thanks. I've merged.