modify opening section
Added a section on Clocks in the AWS tuning docs
Refer to lager_syslog README

Since syslog is now supported by lager, update the FAQ to point to the
lager README. Resolves #231
Add AAE upgrad warning to download
Modify link text for googlability.
Merge pull request #883 from basho/issue-231-lager-syslog

Refer to lager_syslog README
Merge pull request #884 from basho/feature/er/dl-warn-148

Add AAE upgrade warning to download
Provide comparison table on "Choosing a Backend" page

This lists several backend features and characteristics in the same
chart. Addresses issue #349
footnote via sup
Merge pull request #886 from basho/issue-349-backend-matrix

Provide comparison table on "Choosing a Backend" page
Added field props table
Merge pull request #882 from basho/jc/issue399

Added a section on Clocks in the AWS tuning docs
Documented Bucket Policy Elements
Added link to Amazon's Permissions and Policies documentation.
sneak in some cleanup on other docs
new file stub
Two changes made as per coderoshi
clean up riak command line doc
rolling restart doc in reviewable shape
add to global nav