Merge pull request #60 from xizhao/master

Replace `build off` tags with `build ignore`
#53 support tcp:// docker endpoints
add TryMakeURI
Merge pull request #63 from xizhao/tcpfix

#53 support tcp:// docker endpoints
add ActualCloneURL field
change IsGitHubRepository to use actual clone URL
add more repo errors
ErrRedirect constructor
IsGitHubRepository falls back to URI if clone URL doesn't exist
use type nnz.String for ActualCloneURL
override for code.google.com/p/rsc
move authorship types to go-sourcegraph; delete authorship computation rule (unnecessary for srclib)
remove ignored files
Merge pull request #62 from xizhao/master

#54 add api deps command
fix character offsets to be byte offsets
add `src pull --urls` flag to show build data file URLs on sourcegraph.com
Merge pull request #1 from sourcegraph/master

catch up to master