Golem-core

What's Changed
* Increase grace period for max cost calculations by lucekdudek in https://github.com/golemfactory/golem-core-python/pull/151


**Full Changelog**: https://github.com/golemfactory/golem-core-python/compare/0.7.0...0.7.1

What's Changed
* Stability fixes by approxit in https://github.com/golemfactory/golem-core-python/pull/147
* Fix wrong agreement_duration by lucekdudek in https://github.com/golemfactory/golem-core-python/pull/150


**Full Changelog**: https://github.com/golemfactory/golem-core-python/compare/0.6.3...0.7.0

What's Changed
* Debit note and invoice validation fixes by lucekdudek in https://github.com/golemfactory/golem-core-python/pull/149


**Full Changelog**: https://github.com/golemfactory/golem-core-python/compare/0.6.2...0.6.3

**Full Changelog**: https://github.com/golemfactory/golem-core-python/compare/0.6.1...0.6.2

What's Changed
* More verbose Invoice validation failed log by lucekdudek in https://github.com/golemfactory/golem-core-python/pull/141
* Expiration fix by approxit in https://github.com/golemfactory/golem-core-python/pull/143
* Fix debit note frequency validation by lucekdudek in https://github.com/golemfactory/golem-core-python/pull/144
* Add timeout to exec script related methods and get activity state api call method by lucekdudek in https://github.com/golemfactory/golem-core-python/pull/146


**Full Changelog**: https://github.com/golemfactory/golem-core-python/compare/0.6.0...0.6.1

What's Changed
* AggregatingDemandManager by approxit in https://github.com/golemfactory/golem-core-python/pull/137
* Validate debit notes and invoices by lucekdudek in https://github.com/golemfactory/golem-core-python/pull/139

**Full Changelog**: https://github.com/golemfactory/golem-core-python/compare/0.5.0...0.6.0