For given branch return a list of commits.
		Each commit contains basic information about itself.

		:param branch: git branch
		:type  branch: [str]{}
		:param since: minimal timestamp for commit's commit date
		:type  since: int
		:param to: maximal timestamp for commit's commit date
		:type  to: int

def commits(self, branch, since=0, to=int(time.time()) + 86400):
		"""For given branch return a list of commits.
		Each commit contains basic information about itself.

		:param branch: git branch
		:type  branch: [str]{}
		:param since: minimal timestamp for commit's commit date
		:type  since: int
		:param to: maximal timestamp for commit's commit date
		:type  to: int
		"""

		since_str = datetime.datetime.fromtimestamp(since).strftime('%Y-%m-%d')
		to_str = datetime.datetime.fromtimestamp(to).strftime('%Y-%m-%d')
		commits = {}
		req_message = 'https://api.bitbucket.org/2.0/repositories/' + self.reponame + \
					  '/commits/' + branch

		loop_continue = True
		while loop_continue:
			response_data = self._bitbucketAPIRequest(req_message)
			for commit in response_data['values']:
				if commit['date'] < since_str:
					loop_continue = False
					break
				elif commit['date'] > to_str:
					continue
				else:
					commits[commit['hash']] = self._commitData(commit)

			if 'next' not in response_data:
				break
			req_message = response_data['next']
		return commits