#18 Added code to create a separate decor class

for type Transition
#18 Importing transition's scss file
#18 Importing the right files
Merge branch 'master' into issue/18 #18
#18 Fixed typo
#18 Modifying styles
#18 Fixed Logic Gates decorator name overflow issue
#18 Changed Transition svg to HTML decor
#18 Undo changes of SVGWidth param
#18 Updating the css files generated
#18 Fixed PetriNet decor name overflown issue
#18 Deleted redundant files from PN decor folder
#18 Fixed name div's position in FFBD decorator
#18 shorten the name of decor
#18 Name css settings update
#18 Updated css settings for PN decor
#18 Updated FFBD decor css settings
#18 Deleted redundant code from PN decor
#18 Fixed LogicGates Decor connection areas bug
#18 Fixed BPMN decorator connection area bug