indentation across igr-ts projects

[onlyexeption]

Closes #1219

use 2 spaces for indentation across all react igr-ts templates/components

[coveralls]

coverage: 65.956%. remained the same
when pulling fddd3ea on ibarakov/feat-1219
into c3dabe2 on master.

[gedinakova]

The only place remaining is the return statement in main.tsx:
Number.isNaN = Number.isNaN || function(value) { return value !== value; }