added mixpanel
Add https://github.com/go-on/wrap

Used the similar description as muxchain because there are only so many ways you can describe a middlewares package without being biased, but exactly the same description looks weird.
Add goblin and goreq links
Merge pull request #135 from marcosnils/master

Add goblin and goreq links
Add smitego package to the third-party api's area.
Merge pull request #136 from sergiotapia/patch-1

Add smitego package to the third-party api's area.
Merge branch 'master' of https://github.com/dukex/awesome-go

* 'master' of https://github.com/dukex/awesome-go:
  added mixpanel

Conflicts:
	README.md
Added GoRequest
Merge pull request #137 from parnurzeal/master

Added GoRequest
Update README.md

Added govalidator
Merge pull request #140 from asaskevich/patch-1

Update README.md
Add go-relax

New framework, please add to the list.
Merge pull request #141 from codehack/patch-1

Add go-relax
Add gocover.io
Merge pull request #142 from matrixik/patch-4

Add gocover.io
Add: online Golint
Add: errcheck and online GoBuild
Added interpose
Merge pull request #143 from matrixik/patch-5

Add: online Golint
Merge pull request #144 from matrixik/patch-6

Add: errcheck and online GoBuild