df_tool and df_building improvements

df_tool now puts output into $output variable, then returns it ones.
Allows better editing options than multiple returns.
df_item, added lot of items, ATM flawlessly shows every
masterwork_furnace.txt mat.
<nowiki> support for df_building
df_build nowiki
Merge branch 'asvae-master' into asvae-readme

Conflicts:
	Readme.rst