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.
Fix typos
Fix typos
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.
Clarify Python/Django requirements

Nothing really prevents Django 1.3 from working but the tests won't run with
it -- it doesn't have `override_settings()`.

Some code already prevents Graphite-web from running on Python 2.5. Travis
doesn't even support it so it's hopeless to claim 2.5 support.

This patch syncs requirements with what we actually test on Travis, which is
the sanest approach.
Remove uses of sys.exc_info in favor of the py2.6+ syntax
Stop referencing INSTALL
Update render_api.rst
2.6 or greater
Merge branch 'master' into fix/versions
Merge pull request #794 from brutasse/fix/versions

Clarify Python/Django requirements
Merge pull request #694 from ifdattic/patch-1

Fix typos
Add a lint tox target, fix all import issues
Fix some whitespace issues
Fix #796 -- remove the cli app completely
Add missing trailing slash in nginx config example