make layout creating using default templateLayoutFactory templates

[MikeDevice]

• improve layouts creating for markers and balloons
• add dist folder to .gitignore
• fix error at build:umd script

If you'll look at API, you can see such row in example

MyIconContentLayout = ymaps.templateLayoutFactory.createClass(
     '<div style="color: #FFFFFF; font-weight: bold;">{{ properties.geoObjects.length }}</div>')

Now such handlebars are not supported. So I've added this possibility in this pr