Created folders in vendors

Added so users should not make 2 cakephp folders themselves(I didn't understand it at first) if they are following instructions from here:http://book.cakephp.org/3.0/en/installation.html#installing-with-git-github
Minor grammar fixes
Added new section

I added a little modified new section, Keeping up to date with the latest CakePHP changes, from 3.0 documentation(http://book.cakephp.org/3.0/en/installation.html#installing-with-git-github).
Deleted empty file in vendors
Merge pull request #22 from Aleksa-Savic/master

Readme improvements.
Updating default homepage.
Merge pull request #25 from ADmad/homepage

Updating default homepage.
Load manually configured paths first
Use constants defined in paths.php
Use CakePHP internal ClassLoader when composer is not available
Merge pull request #26 from rchavik/classloader

Trimming bootstrap.php
Updated templates.
Update README

Include the actual commands that the developer needs to run, so they
don't have to figure it out.
Configure isn't populated when the autoloader is setup.

Use a basic string instead. Refs cakephp/cakephp#2850
Separating connection and driver, removing extra backslashes
Remove incorrect data.

Refs #30
fix bootstrap.php
Merge pull request #29 from cakephp/datasource-abstraction

Separating connection and driver, removing extra backslashes
Merge pull request #31 from ch0c4/fix-bootstrap

fix bootstrap.php
Fixes fatal error in home.ctp

Fixes `Error: Class 'Cake\Database\ConnectionManager' not found`