Fix incorrect regex

The ".*" regex described under "Dynamic parts spanning several /" does not match the actual functionality of the framework.

For instance, if I describe the route:
GET /blah/*path

...it will not match /blah/
Add a link to CSRF docs
Merge pull request #2841 from benmccann/xsrf-docs-2.2

Xsrf docs 2.2
merge commit for IDE.md (IntelliJ IDEA section)

IDE.md file (IntelliJ IDEA section) updated

The information was updated and the following procedures were added:
- Creating a new Play application
- Importing an existing Play project
- Running/Debugging Play application

IDE.md (IntelliJ IDEA section) updated

Minor changes suggested by Rich Dougherty were included.
Merge pull request #2426 from rhodri/patch-1

Fix incorrect regex
Added details of how to import the cache into the documentation
Merge pull request #2987 from oo03par/2.2.x

Added details of how to import the cache into the documentation
Merge pull request #2722 from elenakozlova/2.2.x

IDE.md file (IntelliJ IDEA section) updated