Rephrase for clarity
Update for missing ISOs, add useful config params

Debian 6.x.x ISOs are no longer available online, so the old URLs don't work.
With the new install, the default 128 MB of memory for our version of QEMU is no longer sufficient.
Some people might get stuck because the keymap isn't set up properly.
Fix typo
Use KVM instead of DBT mode for install
Accommodate users who don't have KVM
Explain why KVM is good for the user
Explain why we keep the .raw; use 'ln' to save space
Remove redundancy
Fix direction of upload
config.lua has to be created by the user
Self-sufficient basic config file
Merge pull request #3 from dslab-epfl/master

Update 25-10-2014