add virtual table component

[kmcs]

added a light weight virtual table component that has really smooth scrolling
its based on https://github.com/rintoj/angular2-virtual-scroll

[coveralls]

Coverage remained the same at 97.552% when pulling 0d8bce5 on kmcs:master into 8ecd9eb on mseemann:master.

[mseemann]

hi. thx for your contribution and sorry for the late reponse. I hope i have time next week to review your component.

[coveralls]

Coverage decreased (-4.0%) to 93.559% when pulling 1f326cb on kmcs:master into 183da20 on mseemann:master.

[coveralls]

Coverage decreased (-1.8%) to 95.77% when pulling dbb69c4 on kmcs:master into 183da20 on mseemann:master.

[coveralls]

Coverage decreased (-0.1%) to 97.432% when pulling 1e72a45 on kmcs:master into 183da20 on mseemann:master.

[coveralls]

Coverage decreased (-0.1%) to 97.447% when pulling b341b22 on kmcs:master into 183da20 on mseemann:master.

[coveralls]

Coverage increased (+1.1%) to 96.883% when pulling abdf282 on kmcs:master into 77a8ea4 on mseemann:master.

[kmcs]

hi, is there something I've forgotten?

[mseemann]

yes, to tell me that you are ready:) i will have a look...

[kmcs]

Hi, I updated to the latest master and got some build errors. It works after update to webpack 4.x. Please merge.

[kmcs]

Now I'm ready :-)