Encourage plugin authors by adding 1.5 to number of installs.

[jsmoriss]

I would suggest adding the following plugin install numbers to encourage authors:

1.5k
15k
150k
1.5m

For example, if a plugin reaches 100k, it can take a long, long time to reach 200k, especially in contrast to seeing 10k jumps previously, and now the next jump is another full 100k. Adding 150k in there would ease the wait and encourage authors - same goes for the 1k to 2k, 10k to 20k, and the 1m to 2m jump. :)

js.