Update README.markdown

Added Intel 82574 Packet of Death NIC failure
Merge pull request #1 from drudru/patch-1

Update README.markdown
Rework intel packet of death slightly
Add Twilio
VoltDB link "clarifying" CAP no longer exists

The CAP "clarification" link has ceased to exist since April 2014. This
change replaces the broken link with a web-archive link from March 27
2014.
Merge pull request #2 from neurodrone/master

VoltDB link "clarifying" CAP no longer exists
More on elasticsearch IO/GC partitions.
You depend on -> we all depend on