Add gopack version to the output when checking the go version.

```
$ ./gp version
gopack version 1.0.0.dev
go version go1.1.1 darwin/amd64
```
Relax the version number.
Merge pull request #28 from calavera/version

Add gopack version to the output when checking the go version.
0.20
Add subversion support.
Merge pull request #29 from calavera/subversion

Add subversion support.
add --dependency-tree to show dependencies and versions
Merge pull request #30 from d2fn/dump-imports

add --dependency-tree to show dependencies and versions
Add tests for the stats analyzer.
Add import stats summary.
Add local references to the summary.
Order stats by remotes and number of occurrences.

Use tabwriter to format the text.
Merge branch 'master' into import_stats

* master:
  add --dependency-tree to show dependencies and versions

Conflicts:
	main.go
Merge pull request #31 from calavera/import_stats

Add import stats summary
Merge branch 'master' into checksum

* master:
  Order stats by remotes and number of occurrences.
  Add local references to the summary.
  Add import stats summary.
  Add tests for the stats analyzer.
  add --dependency-tree to show dependencies and versions
  Add subversion support.
  0.20
  Relax the version number.
  Add gopack version to the output when checking the go version.

Conflicts:
	config_test.go
	main.go