QDeclarativeEngine should enforce case sensitivity on component naming

Run attached example by calling "qmlviewer app.qml". On Unix the execution fails on an error

file:///../app.qml:8:9: MyElement is not a type
             MyElement {
             ^

due to MyElement being written in a file called Myelement.qml. The same code runs fine on Windows and Symbian, where the file system is case insensitive. While this is a small issue, these kind of small differences, "paper cuts", make maintaining cross-platform code tedious and error-prone.