symlink source tree for node-gyp

[tjfontaine]

it would be nice if that after doing a give install v0.8.XX it would also symlink into ~/.node-gyp/v0.8.XX so node-gyp wouldn't bother to download the sourceball

[tjfontaine]

Something like this

diff --git a/give.sh b/give.sh
index dfd1e46..5b0b213 100755
--- a/give.sh
+++ b/give.sh
@@ -29,6 +29,10 @@ give_install () {
   ./configure --prefix="$give_dir/installed/$1" && \
   make &&
   make install
+  ./node -pe "JSON.parse(require('fs').readFileSync('./deps/npm/node_modules/node-gyp/package.json')).installVersion" >> installVersion
+  mkdir -p $HOME/.node-gyp
+  bar=$(echo $1 | awk '{ print substr($0, 2) }')
+  ln -s "$give_dir/src/$1/" "$HOME/.node-gyp/$bar"
 }

 give_rm () {