Wait Default + Logging Improvements (#153)

improved logging of pywb + redis:
- if 'logging' includes 'pywb', log pywb and redis output, to pywb.log and redis.log
- otherwise, just ignore (don't print to stdout as that's too confusing)
- print if wb-manager fails, likely due to existing collection

waitUntil: default to just 'load' to avoid potential infinite loop, separate --netIdle can configure idle wait
dependency: update to latest puppeteer-core (16.1.0)

util/argParser.js

@@ -53,7 +53,7 @@ class ArgParser {
 
       "waitUntil": {
         describe: "Puppeteer page.goto() condition to wait for before continuing, can be multiple separate by ','",
-        default: "load,networkidle2",
+        default: "load",
       },
 
       "depth": {