Update gosrc data.

Add Go program to generate the data used by the package. Add go:generate
comment to invoke the program.

Update the data to Go 1.4 and the latest TLDs.
Upgrade to Bootstrap v3.3.1 and use a CDN
Merge pull request #211 from jayschwa/bootstrap-v3.3.1

Upgrade to Bootstrap v3.3.1
Enable source line links for googlesource.
Merge pull request #210 from garyburd/gosrcdata

Update gosrc data.
Get standard packages from golang.org.

Scrape golang.org to get source files for standard packages. Link
standard package documentation to the source files on golang.org.

Update to handle the new Go 1.4 directory structure with a fallback to
the Go 1.3 directory structure.
Merge pull request #213 from garyburd/googlesourcelinefmt

Enable source line links for googlesource.
Merge pull request #216 from garyburd/ghmove

Get standard packages from golang.org.
Strip .vNN from path when computing package name.

The package importer computes package names from the import path. Update
the importer to strip .vNN suffixes as used on gopkg.in and azul3d.org.

Improve the importer tests.