Update 02. Quick Start.md

Slight change of the ```onBootstrap``` Method, since ```getTarget()``` is called twice by the original example it should be saved into a variable. ```$sm``` and ```$evm``` on the other hand don't even need to be saved for this simple example, but could be for clarities sake - your choice ;)
Update 04. Role providers.md

some minor changes
Update 05. Permission providers.md

minor changes - please note the last change of the file. In the text you name it "permission provider plugin manager" and config key is "permission_provider_manager" - hence in the text i cut the "plugin" to have it identical
Update 04. Role providers.md

cut the word "plugin" here, too
Update 06. Strategies.md

minor changes as always
Merge pull request #3 from manuakasam/patch-1

Update 02. Quick Start.md