Auto adjust x-axis on kmerplots

This is an attempt to give a reasonable kmer plot for the report on the first try in stead of always using the x 0-200 as default. It auto adjusts the x-axis thusly:

Old:
<img src="https://cloud.githubusercontent.com/assets/6576325/5337473/456ef140-7ec9-11e4-97c4-e0738542e726.png" width="300px" height="200px" />
New:
<img src="https://cloud.githubusercontent.com/assets/6576325/5337476/52ccbb10-7ec9-11e4-92c4-0aa3c5058869.png" width="300px" height="200px" />

Also changed the default uppmax config with paths to updated versions of some tools.