Reworded the introduction to the dependency management section.   Attempted to simplify and move away from 'we'.   It isn't that I suggest avoiding 'we' entirely, I use it myself, but if you use 'we' too much in a user manual it starts to sound a bit 'cultish'.
Filed out the intro paragraph a bit
Rewrote most of the introduction.  The itemized list wasn't really a list, so I've changed it to be a bit more obvious that this is listing major highlights of the feature.   I've also added some explanation at the end of the introduction to reinforce the core idea of Gradle:  We support strong conventions, but we give you the freedom to innovate how you see fit.