-Changed qdoc3 build rule to place the binary in qtdoc/bin/
-Created a rule to run 'make qmake' so that qdoc3 finds the modules
-Added a README file

Change-Id: I2402799cf84b970a8102f313fcd016b140acdcba
Reviewed-on: http://codereview.qt.nokia.com/4213


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Casper van Donderen <casper.vandonderen@nokia.com>