Convert LaTeX structure to use subfiles instead of includes. 

This way every subfile can compile independently, which is awesome for text editors such as gummi!

Changes to structure:

Main files moved to a main folder (can be renamed). This is so that paths works both from main file and subfiles, ie. ../yaman_fanfic/yaman.tex  is a valid path both in /main and /yaman_fanfic. 

Discuss whether we want this change, but decide semi fast, as it might get annoying to merge if we wait too long.