Release 0.6.0

[nicl-nno]

Must be solved:

• https://github.com/nccr-itmo/FEDOT/issues/752 (however, the tests and examples are not the part of PyPI release)

Can be included:

• https://github.com/nccr-itmo/FEDOT/pull/724
• https://github.com/nccr-itmo/FEDOT/pull/663
• https://github.com/nccr-itmo/FEDOT/pull/707
• https://github.com/nccr-itmo/FEDOT/issues/753

[gkirgizov]

I'd propose including these changes:

• https://github.com/nccr-itmo/FEDOT/issues/800
• https://github.com/nccr-itmo/FEDOT/pull/818
• https://github.com/nccr-itmo/FEDOT/issues/858
• https://github.com/nccr-itmo/FEDOT/pull/852

And do something with this one:

• https://github.com/nccr-itmo/FEDOT/issues/810

I'd also include in release notes the following enhancements and changes in API:

• https://github.com/nccr-itmo/FEDOT/pull/843
• https://github.com/nccr-itmo/FEDOT/pull/798
• https://github.com/nccr-itmo/FEDOT/pull/825

Probably to make release somewhat faster and not so big, I'd move these to the following release (0.6.1):

• https://github.com/nccr-itmo/FEDOT/issues/705
• https://github.com/nccr-itmo/FEDOT/issues/788
• https://github.com/nccr-itmo/FEDOT/issues/853
• aimclub/GOLEM#23