FIX some problems which lead to jekyll build error

	modified:   _includes/guide-invperc/grid/challenges.html
	new file:   _includes/guide-invperc/assembly/title.md
	renamed:    _includes/guide-invperc/profile/obejctives.html -> _includes/guide-invperc/profile/objectives.html
	new file:   _includes/guide-invperc/test/title.md