Use tables for adding particles, deprecate former way.

separate particles(pawner) definition, add default values, work with no
arguments

The commit didn't work because the blocks weren't loaded yet.

This reverts commit 22dbbf0a.

Conflicts:
	minetest.conf.example

Add lag reporting to masterserver (average dtime)
StyledWriter  -> FastWriter in masterserver announce

because cmake is unable to parse it's own lists properly

This can solve numerous problems such as:
http://www.cmake.org/Bug/view.php?id=13959
http://www.cmake.org/Bug/view.php?id=14601

If pkg-config or freetype2.pc is not found, then fall back to the
FindFreetype.cmake module logic.

Restrict to UNIX since I only tested it here.

Lua does not guarantee that the indexes of a table will be in numerical order.

This doubles performance on some window managers (WTF?!)

Indexes for empty slots shall not be skipped.