Update installer resources #2418

After #2367 has landed, a few things have to be fixed on the Windows and OS X installers:

Regarding the Windows installer, you can remove the following lines (linking of iojs.exe to nodejs.exe):

• https://github.com/cjihrig/node-1/blob/rename/tools/msvs/msi/product.wxs#L52-L57
• https://github.com/cjihrig/node-1/blob/rename/tools/msvs/msi/product.wxs#L127-L131
• https://github.com/cjihrig/node-1/blob/rename/tools/msvs/msi/product.wxs#L265-L270
• https://github.com/cjihrig/node-1/blob/rename/tools/msvs/msi/product.wxs#L282-L284
• https://github.com/cjihrig/node-1/blob/rename/tools/msvs/msi/i18n/en-us.wxl#L15-L16
• https://github.com/cjihrig/node-1/blob/rename/tools/msvs/msi/i18n/de-de.wxl#L15-L16

On OS X, these lines have to be changed:

• https://github.com/cjihrig/node-1/blob/rename/tools/osx-pkg.pmdoc/index.xml.tmpl#L31
• https://github.com/cjihrig/node-1/blob/rename/tools/osx-pkg.pmdoc/index.xml.tmpl#L39-L41
• The symlinking has to be removed on the installer script as well (couldn't find it right now).

io.js icon on the installer must be replaced as well:
https://github.com/cjihrig/node-1/blob/rename/tools/msvs/msi/product.wxs#L28

Same for the OS X installer:
https://github.com/cjihrig/node-1/blob/rename/tools/osx-pkg.pmdoc/index.xml.tmpl#L24