use zprofile instead of zshenv

/etc/profile will overwrite PATH when using zshenv, see
https://bugs.archlinux.org/task/35966

zprofile

@@ -0,0 +1,22 @@
+# extend path
+export PATH="$HOME/local/bin:$PATH"
+
+# nvm
+export NVM_DIR="$HOME/.nvm"
+[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"
+
+# Base16 Shell
+BASE16_SCHEME="solarized"
+BASE16_SHELL="$HOME/.base16-shell/base16-$BASE16_SCHEME.dark.sh"
+[[ -s $BASE16_SHELL ]] && . $BASE16_SHELL
+
+########################
+# Dist related settings
+########################
+case $OSTYPE in
+    "darwin14.0" )
+        export PATH="$(brew --prefix coreutils)/libexec/gnubin:/usr/local/bin:$PATH"
+        export MANPATH="$(brew --prefix coreutils)/libexec/gnuman:$MANPATH"
+        #eval $(ssh-agent -s)
+        ;;
+esac