Soproly now treat variability inside a file, in a fine granularity way.

In XML files we use:

<!-- FEATURE BEGIN A_FEATURE -->

your XML code that treat the variability

<!-- FEATURE END A_FEATURE -->

In Java files we use:

//FEATURE BEGIN A_FEATURE

your Java code that treat the variability

//FEATURE END A_FEATURE

Where A_FEATURE must be a *value* constant that represents a feature,
defined in configspl.py file.

For a example, see: https://github.com/adorilson/MMUnB/commit/9670f
Changing the package attribute in AndroidManifest.xml file
Parsing all directory tree to filter by features