add another FullStackTest for global install

also extract some of the reused code into an base class for
fullStackTests
add GlobalUpdate test
add some cleanup to global test
use real installer for global test
add link to Using composer correctly

 (confoo) by Igor Wiedler
add phpcs as dev dependency to experiment with it
generate a report file on phpcs execution
Update README.md
Merge pull request #110 from diglin/master

Update README.md
decide to commit phpcs report
fix some coding style issues
related to #107

thx to @tkdb for research
add colinmollenhour/modman to composer suggest
add Link to Toran Proxy
Update README.md

known issues section.
Merge pull request #112 from tkdb/patch-1

Update README.md
Update Installer.php

call mkdir recursive, so it does not fail without parent directories.

Fixes #114
Update Mapping.md

change order to reflect the order they are processed in the code
Merge pull request #116 from fooman/patch-1

Update Mapping.md
Merge pull request #115 from Rud5G/patch-1

Update Installer.php