New golemapi
Improved gitignore
Added method golem.is_downtimed()
Fixed .gitignore __pycache__
golem.is_downtimed(): bool return value
Refactoring: _cached() decorator
Simplified _cached() decorator
Fixed travis build
_cached(): using @functools.wraps()
Merge pull request #8 from mdevaev/golem-downtimes

Golem downtimes
Version bump: 0.2