Remove superfluous grid line for log scale.

The code removed in this change added an additional entry to the list of
labels, causing the top of the graph to be extended by self.logBase. As
the corresponding labels have already been drawn, the result is a
graph with n+1 gridlines for n labels. Removing this addition resolves
the issue.

Fixes #235.
Ignore logBase less than one
Expanding the documentation to mention the case where the client is running a more recent version of python than the
server, requiring the pickle protocol version to be specified, to avoid "invalid pickle received" errors
Attempting Categorization

Taking a stab at categorizing the tools. While I appreciate the list, it has never been particularly useful for me to browse the mixed bag alphabetically; Typically, I am in need of a particular type of tool, and categorization would be more helpful to me.

Also, since it was giving me eyebleed from all of the headers and listing each title twice, I turned them all into RST Definition Lists.

Some opinions were made (monitoring, CollectD/Ganglia/Sensu, the Other category). Sue me.

More bikeshedding could be had, but not terribly useful (chars-per-line, etc)
Fixing missing indentation

Somehow three lines either were missed, or somehow mucked up in the copy.
Update dashboard.js

Tinkering with the input box I set refresh interval to 0 and various negative numbers.  This would cause cpu load to spike, and the graphs would never load.  The time in the upper right would tick off every second, though I suspect it was ticking much faster but it only has 1-second resolution.  The first time I did this Firefox stopped behaving for ~2-3 minutes but eventually let me change it. I repeated this test using firebug and confirmed it was essentially refreshing the UI as fast as it could spawn new requests.  This diff ensures the refresh interval is a positive number greater than or equal to '1'.  I originally set it '>0' but the decided to see what would happen if I fed '0.1' via the UI and the bug came back.  This diff appears to work for me.
Fix #796 -- remove the cli app completely
Add missing trailing slash in nginx config example
Remove # prefix in RGB colors passed to colorList
Merge pull request #801 from kevinrobinson/patch/remove-hash-prefix-in-color-list

Remove # prefix in RGB colors passed to colorList
add squareRoot function, fixes #792
noticed that invert() was missing from the composer widget, refs #66
need to import math for test_squareRoot
jump to next iteration if None
Merge pull request #804 from obfuscurity/invert-widget

Add invert() to the composer widgets
Merge pull request #803 from obfuscurity/sqrt

Add squareRoot function, fixes #792
Fix indentity function -- convert time.mktime floats to int for start and end time values
Merge pull request #800 from brutasse/fix/remove-cli

Fix #796 -- remove the cli app completely
Merge pull request #724 from linkslice/master

Update dashboard.js refresh interval bug fix
add pow() function, convert squareRoot() and invert() to use safePow() instead, refs #803