The Augusta Chronicle, which many forget to check but which has arguably the best Masters coverage short of the official Masters website, just posted 25 very recent aerial photographs of the course. Many design principles, and changes, can be observed. Enjoy.
http://www.augusta.com/masters/photos/2015-augusta-national-aerials-2015?utm_content=bufferf466e&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer#slide=1
I used to be able to tell some of our members that love tree plantings everywhere to at least look at Augusta and notice how they have a lot of trees, but none within 50 yards of a green ... just let the greens sit alone. Now it looks like a few holes (notably 14) have started to plant trees near greens as well.
Andrew,
A quick look at Google Earth's historical images shows that there were trees front left of the green going back at least as far as the early 90s. 3-4 trees beyond those, sort of back left of the green, appear to have been added sometime around 2006-7. That also looks to have been around the same time as they built a new tee for #15, back and to the left of where the previous tees were. The new trees were probably more related to the new tee on #15 than any change they were looking for on #14.
Because those trees are all on the north side of the green, I suspect they don't cause any significant shade issues for the putting surface. They look to be 10 or so yards from the left edge of the green.