Title template (#194)

* added template option and validation

* update comment link to element list

* get author info when fetching video info

* added template elements to video object

* minor function naming changes

* better exit message for template error

* changed template elements for better substitution

* implemented video title template

* removed trailing decimals on duration

* added template description

* removed hashing from uniqueId
removed debug logger.warn()

* fixed typos in default template
added elements to template fail message

* moved ffmpeg version logging to verbose

src/Utils.ts

@@ -182,7 +182,7 @@ export function checkOutDir(directory: string): boolean {
 export function checkRequirements(): void {
     try {
         const ffmpegVer: string = execSync('ffmpeg -version').toString().split('\n')[0];
-        logger.info(`Using ${ffmpegVer}\n`);
+        logger.verbose(`Using ${ffmpegVer}\n`);
     }
     catch (e) {
         process.exit(ERROR_CODE.MISSING_FFMPEG);