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Added symbols for "direction control", "track marking", "pylons" and electric wiring; changed symbol for "friction bufferstop"; created an encapsulating package for future flexibility - changed load command for library to \textbackslash usepackage\{tikz-trackschematic\}.
revised symbol and syntax for balises; replaced "\textbackslash gettikzxy" with "\textbackslash path let" syntax; fixed PackageWarning Error in development mode; fixed foreground of sidetrack (alias)