added option for initial volume setting
Added documentation about the new volume option
Merge pull request #985 from IndiGit/master

added bpd option for initial volume setting
Changelog for #985
play: remove temporary m3u file
play: removing tmp file (changelog)
Remove prefix diff highlighting

This was well-intentioned but ended up being more confusing than it was worth.
It's always confused me when one digit gets un-highlighted in one of these
displays. The straw that broke the camel's back was when I got a "#1 -> #16"
change where the numeral "1" was un-highlighted. To fix this right would be
way more trouble than it's worth; I'm glad to be rid of this detail.

Conflicts:
	docs/changelog.rst
Malformed date queries no longer crash
Update embedart.rst
Bug #911 reimport detection for the `importadded` plugin

Reimports are now detected by inspecting the fields for reimported items
and replaced albums in ImportTask.

Reimported albums and items are skipped.