quietly switch submodule url for all libs fetched from gopkg.in.

gopkg.in is... a cute idea.  If you don't have any other version control.

If you *DO* have version control -- say, a nice thing like git submodules --
then that site just gets in your way *massively*.

In a particular strike of irony, what brings this to my attention is that
I want a bugfix in go-git which is several months old:
src-d/go-git#623

The joke is... this bug regards go-git's handing of *gopkg.in*.

And I can't fetch it because of... gopkg.in.
(Even going into our submodule and directly fetching and explicitly
asking for `git checkout origin/master` *doesn't work* because
gopkg.in works by *lying* about what git master *is*.  Whee.)

Ke ke ke.

So.  We can't *not* have the gopkg.in paths in our gopath, because
go-git internally references their own packages with that path
(I've commented before that I think this is a mistake in another issue:
src-d/go-git#76 ... but whatever, moving on);
go imports just don't work like that.

But we *can* tell git submodules to fetch from somewhere else.

And this will actually work fine.
Chalk up another point scored for git submodules -- complex? sure;
but dang if they don't get the job done, even in an *incredible*
variety of complex situations.

I'm splitting the actual library updates into a separate commit
(it'll be noisy -- guess why.  They changed the version of some
of their other libraries, so we actually get to see *new paths*
from gopkg.in.  Fun!).

Signed-off-by: Eric Myhre <[email protected]>

Author: warpfork

.gitmodules

@@ -18,7 +18,7 @@
 	url = https://github.com/syndtr/gocapability
 [submodule ".gopath/src/gopkg.in/alecthomas/kingpin.v2"]
 	path = .gopath/src/gopkg.in/alecthomas/kingpin.v2
-	url = https://gopkg.in/alecthomas/kingpin.v2
+	url = https://github.com/alecthomas/kingpin
 [submodule ".gopath/src/github.com/alecthomas/template"]
 	path = .gopath/src/github.com/alecthomas/template
 	url = https://github.com/alecthomas/template
@@ -33,13 +33,13 @@
 	url = https://github.com/polydawn/go-timeless-api
 [submodule ".gopath/src/gopkg.in/warnings.v0"]
 	path = .gopath/src/gopkg.in/warnings.v0
-	url = https://gopkg.in/warnings.v0
+	url = https://github.com/go-warnings/warnings
 [submodule ".gopath/src/gopkg.in/src-d/go-billy.v3"]
 	path = .gopath/src/gopkg.in/src-d/go-billy.v3
-	url = https://gopkg.in/src-d/go-billy.v3
+	url = https://github.com/src-d/go-billy
 [submodule ".gopath/src/gopkg.in/src-d/go-git.v4"]
 	path = .gopath/src/gopkg.in/src-d/go-git.v4
-	url = https://gopkg.in/src-d/go-git.v4
+	url = https://github.com/src-d/go-git
 [submodule ".gopath/src/golang.org/x/crypto"]
 	path = .gopath/src/golang.org/x/crypto
 	url = https://go.googlesource.com/crypto