Merge pull request #2 from Bart-CER/master

Changed some smaller things in the slides, tried to say the same thing b...
Simplify introduction

Removed a lot of technical jargon from the start of the presentation.

Made it clear that NeSI provides more than HPC
Delete NeSI_template.log
Delete NeSI_template.nav
Delete NeSI_template.aux
Delete NeSI_template.out
Delete NeSI_template.snm
Delete NeSI_template.toc
Delete NeSI_template.vrb
changes suggested by tim