Make the command accept several paths as arguments
Remove minification ability from Bookmarkler
Add minification ability directly to command
Make command retrieve source of all files
Make the command concatenate all the source files
Merge branch 'file-concatenation-feature'
Add `no-minify` option to command
Add method checking if a file can be minified

This change adds a method checking the `no-minify` option to determine if it is allowed or not to minify the file located at a given path.
Implement actual `no-minify` behavior in command
Merge branch 'no-minify-command-option'
[fix] Bookmarkler test was failing

The minification ability has been removed from the Bookmarler class (and reimplemented in the command). This test needed to be updated in order not to expect minification to happen anymore.