fix html syntax error in serviceview template introduced by dynamic images rewrite
Merge pull request #280 from obliadp/devel

fix html syntax error in serviceview template introduced by dynamic imag...
docs: Transform table format to field list
docs: Try to eliminate layout problem
with longer descriptions of more than one section.
docs: Block syntax with "|" in extended field lists
Suggest capabilty removes unneeded graphs

Added checks to update_data to not graph things that:
a) Aren't supported in the mysql version
b) Aren't configured (e.g. bin logs and replication)
getversion: handling detached checkouts
Makefile: doc/_build can be a symlink

Using 2 commands, since $(BUILDDIR) can be a symlink. Usually to a
subdir in $HOME/public_html/ to be able to debug it easily
Merge branch 'handle-detached-checkouts' into devel
doc: adding the preface summary
doc: introducting `m-r-b`
Merge branch 'guide' into devel
getversion: better handing of the (detached)
doc: formatting the preface index
Merge pull request #263 from openquery/suggest

Suggest capabilty removes unneeded graphs
Add a "plugin writing tips" page

This will complement the basic "how to write a plugin" page, which should be as basic as
possible (but no more than that).
Mark example as a code block
Add galera monitoring variables

Based on work by <mrten+munin@ii.nl> submitted here:
https://github.com/kjellm/munin-mysql/commit/19aa49f14368a35909cf4f23b4fc591cad5e3b67
better handling of undefined data
fix wsrep_flow_control_sent/wsrep_flow_control_recv as DERIVES and make the wsrep_flow_control_recv -ve on same graph