Updating installation instruction.

Updating installation instruction. Adding actualized links on tools.
- Deleting links and descriptions related with rbenv
- Adding links to Chef Development Kit
- Specifying more specific information about VM

Actualizing instruction which can provide possibility to install VM with
project environment.
Revert "Updating installation instruction."

This reverts commit e8058c6f6be962e2f51dc7cd9349f96c7c39d5ad.
Revert "Revert "Updating installation instruction.""

This reverts commit 26650662468eeead962e8cd77d6e399c2115ed7a.