Improved general usage and added CMake integration

[Pseudomanifold]

Dear authors,

I improved the general usage of the runMLG application by implementing proper loading and processing for arbitrary data sets. Moreover, I added generic CMake integration such that building the tool should now be easier.

Hope you like this pull request; let me know if I can improve it in any way. Thank you very much for providing your code in the first place, I really appreciate it!

[horacepan]

Hi @Pseudomanifold, Currently don't have capacity to review the pull request but I'll try to get to it by mid December. Thanks for taking the time to submit this pull request! It's very much appreciated and I'm glad you found the code to be useful :)

[Pseudomanifold]

Dear Horace,

Take your time! I merely wanted to 'push' my changes lest I forget about them in some forlorn repository. There's definitely no rush!

Best, Bastian