LICENSE: tweak license file so the GitHub API detects it correctly.
LICENSE: tweak license file so the GitHub API detects it correctly.

It uses https://github.com/licensee/licensee. It's very sensitive.
Now I've installed licensee locally and experimented until running
this Ruby program prints out the desired result:
```
require "licensee"

scipy = Licensee.project("../scipy")

print scipy.license.name
print "\n"
print scipy.matched_file.filename
print "\n\n"
```

Result:
```
BSD 3-Clause "New" or "Revised" License
LICENSE.txt
```

Also note that licensee uses a cache based on the Git hash. So
experimenting with it requires committing your change each time.

ilayn/scipy,WarrenWeckesser/scipy,ilayn/scipy,anntzer/scipy,gertingold/scipy,mdhaber/scipy,perimosocordiae/scipy,gertingold/scipy,vigna/scipy,person142/scipy,nmayorov/scipy,Eric89GXL/scipy,Stefan-Endres/scipy,WarrenWeckesser/scipy,vigna/scipy,nmayorov/scipy,arokem/scipy,WarrenWeckesser/scipy,gertingold/scipy,perimosocordiae/scipy,perimosocordiae/scipy,grlee77/scipy,aarchiba/scipy,anntzer/scipy,andyfaff/scipy,tylerjereddy/scipy,scipy/scipy,pizzathief/scipy,mdhaber/scipy,endolith/scipy,rgommers/scipy,Eric89GXL/scipy,jamestwebber/scipy,anntzer/scipy,aeklant/scipy,arokem/scipy,e-q/scipy,lhilt/scipy,zerothi/scipy,rgommers/scipy,aeklant/scipy,mdhaber/scipy,pizzathief/scipy,endolith/scipy,e-q/scipy,Stefan-Endres/scipy,jor-/scipy,arokem/scipy,matthew-brett/scipy,jor-/scipy,matthew-brett/scipy,Stefan-Endres/scipy,aarchiba/scipy,rgommers/scipy,mdhaber/scipy,WarrenWeckesser/scipy,ilayn/scipy,vigna/scipy,perimosocordiae/scipy,anntzer/scipy,jamestwebber/scipy,rgommers/scipy,vigna/scipy,anntzer/scipy,zerothi/scipy,WarrenWeckesser/scipy,ilayn/scipy,Stefan-Endres/scipy,e-q/scipy,tylerjereddy/scipy,zerothi/scipy,zerothi/scipy,mdhaber/scipy,matthew-brett/scipy,scipy/scipy,nmayorov/scipy,grlee77/scipy,mdhaber/scipy,e-q/scipy,Stefan-Endres/scipy,aeklant/scipy,Eric89GXL/scipy,endolith/scipy,WarrenWeckesser/scipy,rgommers/scipy,scipy/scipy,matthew-brett/scipy,scipy/scipy,person142/scipy,andyfaff/scipy,aarchiba/scipy,pizzathief/scipy,arokem/scipy,Stefan-Endres/scipy,matthew-brett/scipy,grlee77/scipy,anntzer/scipy,nmayorov/scipy,perimosocordiae/scipy,aarchiba/scipy,andyfaff/scipy,person142/scipy,tylerjereddy/scipy,jor-/scipy,jor-/scipy,Eric89GXL/scipy,zerothi/scipy,scipy/scipy,jamestwebber/scipy,andyfaff/scipy,endolith/scipy,ilayn/scipy,lhilt/scipy,gertingold/scipy,ilayn/scipy,tylerjereddy/scipy,e-q/scipy,jamestwebber/scipy,andyfaff/scipy,zerothi/scipy,jor-/scipy,andyfaff/scipy,person142/scipy,arokem/scipy,endolith/scipy,person142/scipy,pizzathief/scipy,aarchiba/scipy,aeklant/scipy,Eric89GXL/scipy,endolith/scipy,jamestwebber/scipy,pizzathief/scipy,tylerjereddy/scipy,gertingold/scipy,perimosocordiae/scipy,aeklant/scipy,Eric89GXL/scipy,scipy/scipy,lhilt/scipy,vigna/scipy,lhilt/scipy,grlee77/scipy,grlee77/scipy,lhilt/scipy,nmayorov/scipy