Profile Creation Fix + Cloudflare Wait Support + UserAgent Fix (#128)

* cloudlfare wait improvements (#110 fix)
- set navigator.webdriver to false to help with cloudflare wait
- add checkCF() that will detect cloudflare ddos page and wait 5 seconds until original page is loaded

* chrome args refactor:
- move to utils/browser
- add LazyFrameLoading disable to fix occasional issues with page.goto() never finishing
- add userAgent option

* profile creation improvements:
- fix loadProfile() missing await
- fix url to support running remotely
- load shared chromeArgs()
- add --proxy to support profile creation through pywb proxy

* fix setting custom userAgent (#90)
- fix typo that resulted in error
- ensure userAgent is applied separate from emulatedDevice
- add getDefaultUA() browser util

package.json

@@ -1,6 +1,6 @@
 {
   "name": "browsertrix-crawler",
-  "version": "0.5.0-beta.6",
+  "version": "0.5.0-beta.7",
   "main": "browsertrix-crawler",
   "repository": "https://github.com/webrecorder/browsertrix-crawler",
   "author": "Ilya Kreymer <ikreymer@gmail.com>, Webrecorder Software",