Add initialization script

Signed-off-by: Lars Kiesow <lkiesow@uos.de>
Added some documentation

Signed-off-by: Lars Kiesow <lkiesow@uos.de>
Merge branch 'master' of https://github.com/lkiesow/ess

Signed-off-by: Sven Haardiek <Sven@Haardiek.de>

Conflicts:
	schema.sql
Read in id3-tags from files folders

Signed-off-by: Sven Haardiek <Sven@Haardiek.de>