Glue Factor implementation

First try of glue factor implementation, new function: diagonal sum of
matrix in utilities, restructuring of code. -> Problems in
messagePassing file, not yet working.
gitignore update
Update code
Udate .gitignore file

Exclusion of .metadata files from GitHub
Merge branch 'master' of ssh://github.com/dagilgen/Phase_Locked_Loops

Conflicts:
	Phase_Locked_Loop/main.py