rename Pkg.release => Pkg.free

for @simonster, see

JuliaLang@4b92a8c#commitcomment-4362500

base/pkg.jl

@@ -31,7 +31,7 @@ clone(url::String, pkg::String) = cd(Entry.clone,url,pkg)
 checkout(pkg::String, branch::String="master"; merge::Bool=true, pull::Bool=false) =
  cd(Entry.checkout,pkg,branch,merge,pull)
 
-release(pkg::String) = cd(Entry.release,pkg)
+free(pkg::String) = cd(Entry.free,pkg)
 
 pin(pkg::String) = cd(Entry.pin,pkg)
 pin(pkg::String, ver::VersionNumber) = cd(Entry.pin,pkg,ver)
@@ -58,6 +58,7 @@ build(pkgs::String...) = cd(Entry.build,[pkgs...])
 
 generate(pkg::String, license::String) = cd(Generate.package,pkg,license)
 
+@deprecate release free
 @deprecate fixup build
 @deprecate fix pin
 

base/pkg/entry.jl

@@ -147,13 +147,13 @@ function checkout(pkg::String, branch::String, merge::Bool, pull::Bool)
  _checkout(pkg,branch,merge,pull)
 end
 
-function release(pkg::String)
+function free(pkg::String)
  ispath(pkg,".git") || error("$pkg is not a git repo")
- Read.isinstalled(pkg) || error("$pkg cannot be released – not an installed package")
+ Read.isinstalled(pkg) || error("$pkg cannot be freed – not an installed package")
  avail = Read.available(pkg)
- isempty(avail) && error("$pkg cannot be released – not a registered package")
- Git.dirty(dir=pkg) && error("$pkg cannot be released – repo is dirty")
- info("Releasing $pkg")
+ isempty(avail) && error("$pkg cannot be freed – not a registered package")
+ Git.dirty(dir=pkg) && error("$pkg cannot be freed – repo is dirty")
+ info("Freeing $pkg")
  vers = sort!([keys(avail)...], rev=true)
  while true
  for ver in vers