Adding of SWRL chapter

* Added chapter about SWRL
New bibliography entry

* Added new bibliography entry about SWRL
Additional taret, expansion of all target

* Added a new target for cleaning onlyt the temp. files
* Added the new target as post executiona for all target
Layout

* Changed layout to match overall design
Syntastic changes

* Minor changes in syntax
Syntastic changes

* Changed minor things in syntax
Further development of SPARQL chapter