Merge pull request #13 from faizkhan00/vagrant

Add cpuexecutioncap as non-default setting to Vbox, add default Omni AWS...
Remove redundant AWS config, put some VBox config at top-level
Add port for omniwallet web service (31337), modify order of apt-get to be more efficient (less apt-get updates),  add echo user-facing messages and updated snapshot extraction (mtools-snapshot)