Initial Commit

	- provides a linked list wrapper for stack accessing
	- provides exercise documentation
Adds a pdf version of the documenation
Fixes compilation errors and avoids memory leaks.

Further Changes:
		- updates the .gitignore, stack is now ignored
		- updates the doxygen comments
Merge branch 'master' of C:\Users\fxdapokalypse\git\Algo_2

Merges the git repositories 'exercise 1' and 'exercise 2'