Improve isolation on nodejs and cloud9

Won't create /opt/slapgrid/.npm anymore

component/cloud9/buildout.cfg

@@ -33,7 +33,7 @@ repository = https://github.com/ajaxorg/cloud9.git
 location = ${buildout:parts-directory}/${:_buildout_section_name_}
 git-binary = ${git:location}/bin/git
 npm-binary = ${nodejs:location}/bin/node ${nodejs:location}/bin/npm
-environment = export GIT_SSL_NO_VERIFY=true; export PATH=${nodejs:location}/bin:$PATH; export LDFLAGS=-L${libxml2:location}/lib;
+environment = export GIT_SSL_NO_VERIFY=true; export PATH=${nodejs:location}/bin:$PATH; export LDFLAGS=-L${libxml2:location}/lib; export HOME=${:location};
 command = ${:environment} (${:git-binary} clone --quiet ${:repository} ${:location} && cd ${:location} && ${:git-binary} reset --hard ${:commit} && ${node-sm:location}/node_modules/.bin/sm install && ${:npm-binary} install) || (rm -fr ${:location}; exit 1)
 update-command =
 
@@ -50,4 +50,4 @@ packages =
   cloud9==0.7
 # Specify environment jsDAV (dependency of cloud9) needs libxml2
 environment = 
-  LDFLAGS=-L${libxml2:location}/lib -Wl,-rpath=${libxml2:location}/lib
+  LDFLAGS=-L${libxml2:location}/lib -Wl,-rpath=${libxml2:location}/lib
\ No newline at end of file

component/nodejs/buildout.cfg

@@ -18,6 +18,7 @@ configure-options =
   --openssl-includes=${openssl:location}/include
   --openssl-libpath=${openssl:location}/lib
 environment =
+  HOME=${buildout:parts-directory}/${:_buildout_section_name_}
   PATH=${pkgconfig:location}/bin:${python2.7:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${openssl:location}/lib/pkgconfig/
   CPPFLAGS=-I${zlib:location}/include
@@ -47,4 +48,4 @@ origin = https://github.com/isaacs/npm.git
 git-bin = ${git:location}/bin/git
 node-bin = ${nodejs-0.4:location}/bin/node
 command = (GIT_SSL_NO_VERIFY=true ${:git-bin} clone --quiet ${:origin} ${:location} && cd ${:location} && ${:git-bin} reset --hard ${:commit} && ${:location}/configure --prefix=${:location} && GIT_SSL_NO_VERIFY=true ${:git-bin} submodule update --init --recursive && ${:node-bin} cli.js install npm@1.0.106 -g -f) || (rm -fr ${:location}; exit 1)
-update-command =
+update-command =
\ No newline at end of file