Format tables in README.md
Created by: matofeder
This PR does the formatting of all tables in the README.md file. This PR does not change the content of tables, just prettifies their markdown format.
This PR should simplify further editing of tables in the README.md file.
TIP: Creating tables with hyphens and pipes can be tedious. This could be automatized by e.g. IDE extensions or by tools like http://markdowntable.com/