To add a new file in SVN
svn add file_name
svn commit -m "text about changes..."
To add a new file in a directory in SVN
svn add directory_name/file_name
svn commit -m "text about changes"
To add all new files in a directory with some targets (files) are already versioned (added):
svn add directory_name/*
svn commit -m "text about changes"