Necessary Eclipse plugin not listed in README.md

[prrvchr]

Hi,

If you follow the README.md to install Eclipse for commiter you will notice that the Project Natures in the Properties lists two missing components.

If you want to get rid of these messages in Project Natures you need to install the following two plugins:

• Checkstyle Plugin (eclipse-cs)
• Eclipse Web Developer Tools

It took me a while to find that those two lines marked as missing were from two plugins that needed to be installed.

So it would be a good idea to mention that in the README.md.

[smehrbrodt]

Can you add a PR for that? Maybe it can even be listed as dependency somewhere?