Merge pull request #2 from jklausa/master

Add section about access modifiers.
Added a new item
Merge pull request #3 from batalia/master

Added a new item
Add table of content item
Fix link
Add optional booleans
Update table of contents with optionals
Fix the optionals link
Lose the how's
Fix access modifiers link
Update link to optionals
Add access control
Add C++ support
Fix C++ support link
Add Exceptions
Fix Exceptions sources
Add usage of -at- sign in front of keywords
Add link to usage of -at- sign
Add source to Access Control
Remove duplicate entry