Update sysadmin_tools.rst

adding byobu usage
line length, description

lines wrapped at 80 chars, added short description about Byobu and why
you should use it
adding initial content to hardware
Try to explain a littl about crisis management.

Just an incomplete first draft. Needs more detail.
Expand the crisis response section.

Some words abuot how important procdures are for dealing with a crisis.
This is not the place to describe how to create a procedure (that looks
like it belongs in the Business Continuity Planning section under
Disaster Recovery), but it definitely is the place to describe how
useful they are for responding to disasters.
Adressing pull request concerns.
typos in package management 101
Add note on upgrading all packages with yum
Add note on cleaning the yum database
updated front page pitch, fixed some typos, added more details
typo fixes again
hmmmm another update, more cleanup
final typo fix
Addresses additional issues, rewording of last sentence in blades section
missed attache typo
Merge pull request #99 from avleen/index

updated front page pitch, fixed some typos, added more details
Update sysadmin_tools.rst

firmed up descriptions in byobu section
Merge pull request #98 from jeekl/yum

Add note on upgrading packages to Yum
Merge pull request #90 from gpapilion/hardware

adding initial content to hardware
typo