Added support for updating go packages
Automatically add GOPATH to SDK paths even when only one dir is in GOPATH
Added a check for GOPATH inside GOROOT
Merge pull request #443 from dlsniper/improve-go-get

Added support for updating go packages
Merge pull request #444 from dlsniper/always-add-gopath

Automatically add GOPATH to SDK paths even when only one dir is in GOPATH
Merge pull request #445 from dlsniper/gopath-in-goroot-check

Added a check for GOPATH inside GOROOT