Add screenshots to .gitignore
Fix an incorrect override, leading to an overload.
Merge pull request #22 from lukedirtwalker/oomodel_enhancements

Oomodel enhancements
Simplify the type() method of GlobalScopeExpression
Make it easier to detect single clicks
Improve mouse handling in GenericHandler by using click detection
Fix the main documentation page
Use methodDefinition instead of ref()->target() in ValueAtReturnVisitor
Embed two videos in the youtube documentation
Scroll using just the wheel and zoom using the wheel + CTRL

Shift + Wheel scrolls on the horizontal axis.
Move items by holding Shift, not CTRL as before
Pan the view by holding down CTRL
Update the java import tool to reflect the latest changes to oomodel
Improve test registration
Only show the command prompt at startup when no tests are requested