Add a UI to the Windows installer

We'll be able to control whether the app starts up or not after
installation.
Switch license file to rtf and to the right license
Merge tag '4.1.0' into windows-installer-ui

4.1.0
Update license reference
Statsd Batching| Allow to send several datapoints in one udp packet
Statsd Batching| Fix docstring and use some float in the tests
Merge branch 'master' into statsd_batching
Make source install install the dependencies it requires
Fix python-redis dependency
Split out non pure python dependencies that are not absolutely required
Fixed closing parenthesis
Releaste tag will be 5.0.0
Merge with master
Prepare installation script for SCA Agent release
Fix install script for centos
Fix install script on centos 5
Fix install script on centos 5
Update copyright
Gather lock counts for the current db

Tag with lock mode and table name (though indices will show up here
as well).
Make install script available on Amazon Linux