README: Add a Getting Help section

[noci]
README: Fix the issue link
Add links for facts and nodes in fact table macro

Added links to the node page from the facts_table if show_nodes is True.
Added links to the facts page from the facts_table if show_nodes is
False.
Added logic to switch TH table from facts to nodes if show_nodes is True.
Merge pull request #19 from daniellawrence/fact_table_template_title_and_links

Add links for facts and nodes in fact table macro
Support PuppetDB API v3.

Recently changes were made to pypuppetdb to support, at a basic level,
the v3 API introduced with PuppetDB 1.5.

This commit changes some internals of Puppetboard to handle the new
situation:
 * The experimental endpoints are gone, so is the ExperimentalDisabled
   Error;
 * v2 API can no longer access Reports/Events so we now check that we're
   talking at least v3 API;
 * Introduce a configuration setting PUPPETDB_API which takes an integer
   repersenting the API version we want to talk.
Add flag to enable or disable the query page

Puppetboard is an excelent radiator of information, but sometimes
we want to expose information to users we don't trust giving full
access to the PuppetDB query language.

I would reccomend that Puppetboard be run twice. One, with query
enabled, run on a port behind apache login. Another, with query
disabled, run unproxied for the unwashed masses.

Closes #10.
facts: Add graph for facts endpoint.
_macros.html: Add a second Pie chart to facts/<fact>

The second chart is in order of the value of the fact. So in the
uptime fact we see 1 day before 2 days before 50 days.
_macros.html: mod ensure different adjecent colors
_macros.html: Graphs a bit smaller, FlatUI colors.

Currently the graphs are shown at the top of the page and because of
that really take up a lot of screen real estate. This commit makes the
graphs a bit smaller but we really need to rethink the layout here.

Additionally we switch the colors to the FlatUI swatches to match the
rest of the theme better.
puppetboard/templates/_macros.html

This adds sorting and bucketing to the two graphs in the facts
view.
Merge pull request #20 from nibalizer/graph_fix

_macros.html: Sorting and bucketing facts graphs.
requirements: Upgrade to pypuppetdb 0.0.4
nodes: Check PUPPETDB_API, not _EXPERIMENTAL.
0.0.2: Release.

This is the second 'release' for Puppetboard introducing some new
features and compatibility with PuppetDB 1.5 / v3 API.
README: Add newline after code-block.