[Jira] Added issue changelog and worklog method calls to docs (#1122)

* Update jira.rst

Added jira.get_issue_changelog method and fixed some missing comments and typos

* Update jira.rst

Added docu for retrieving and sending issue work log entries

* Remove trailing spaces

docs/jira.rst

@@ -268,15 +268,27 @@ Manage issues
     jira.issue_archive(issue_id_or_key)
 
     # Restore an issue
-    issue_restore(issue_id_or_key)
+    jira.issue_restore(issue_id_or_key)
 
     # Issue Comments
     jira.issue_get_comments(issue_id_or_key)
 
+    # Get issue comment by id
     jira.issue_get_comment(issue_id_or_key, comment_id)
 
+    # Get comments over all issues by ids
     jira.issues_get_comments_by_id(comment_id, [comment_id...])
 
+    # Get change history for an issue
+    jira.get_issue_changelog(issue_key)
+
+    # Get worklog for an issue
+    jira.issue_get_worklog(issue_key)
+
+    # Create a new worklog entry for an issue
+    # started is a date string in the format %Y-%m-%dT%H:%M:%S.000+0000%z
+    jira.issue_worklog(issue_key, started, time_in_sec)
+
 
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