Merge pull request #11 from matemegyesi/master

fix: @ instead of * for matrix mult

[ADD] change to newer numpy version directives

[ADD] License file

[ADD] Separate radiation pattern calculation and plotting (Plotly)

[DEV] Realistic gain normalization - coherent processing gain

[ADD] Extend the documentation of radiation pattern plot

Extended with beamforming and direction of arrival estimation algorithms

Radiation pattern plot for antenna arrays

Initial commit