adding .gitignore for examples
adding .gitignore for examples

empereor/cvrf-to-html,empereor/cvrf-to-html,STIXProject/stix-to-html,empereor/cvrf-to-html,empereor/cvrf-to-html,STIXProject/stix-to-html,STIXProject/stix-to-html,STIXProject/stix-to-html