Updated folders and files to ignore when the template is exported

These files are present in the repository but useless to run a build
version of Sleek. The Factory runs a "git export" command and will
ignore them, meaning they won't be included in the final app package.
Samsung Smart TV built version separated from other versions

The build script builds all versions but copies all the files needed
to run the Samsung version to the "build/samsungtv" folder. The
manifest file sets the "startfile" property accordingly.

The Factory will thus ignore other folders when it deploys an app
that uses Sleek for Samsung Smart TV.

This is only a first step. The build script should probably create one
build folder per version (main drawback is that the Factory does not
have any mechanism to share resources across builds when different
folders are used).
Template built. v1.5.0.