get_project_issues_count should escape project name

[springfan]

jira.py's get_project_issues_count def should escape project name. Otherwise one may face issues like this if project key contains reserved JQL words:

ERROR:atlassian:{'errors': {}, 'errorMessages': ["Error in the JQL Query: 'INPUT' is a reserved JQL word. You must surround it in quotation marks to use it in a query. (line 1, character 11)"]}

[gonchik]

Let's reuse that commit.
#165

I am going to upload a new release

Cheers,
Gonchik Tsymzhitov