Migrate to dep (#3972)

* Update makefile to use dep

* Migrate to dep

* Fix some deps

* Try to find a better version for golang.org/x/net

* Try to find a better version for golang.org/x/oauth2

vendor/github.com/blevesearch/bleve/analysis/test_words.txt

@@ -1,7 +0,0 @@
-# full line comment
-marty
-steve # trailing comment
-| different format of comment
-dustin
-siri | different style trailing comment
-multiple words	with different	whitespace