Updating dead references to MapReduce, Search, 2i comparison.
Adding missing "\" to curl command in fast-track link walking tutorial
Merge pull request #196 from alexmoore/tiny-error-in-fast-track

Adding missing "\" to curl command in fast-track link walking tutorial
Somehow ended up with 5 copies of same video, and 2 missing captions
Expand Configuration Files/default_bucket_settings area
Fix links per Eric's suggestions
Merge pull request #194 from hectcastro/remove-mr-2i-comparison

Updated dead references to MapReduce Search 2i Comparison
Merge pull request #197 from macintux/do-not-need-5-identical-videos

Somehow ended up with 5 copies of same video, and 2 missing captions
Merge pull request #198 from dmitrizagidulin/default_bucket_props

Expand Configuration Files/default_bucket_settings area