Version 0.1.7

• removed useless inline directives;
• fixed value_type_f32 feature;
• optimized methods Highest, Lowest, HighestLowestDelta;
• removed unused field on SMM method;
• benchmark updates;
• added methods HighestIndex, LowestIndex;
• action internal SignalType made the same as PeriodType;
• removed useless Default implementations for methods;
• added Aroon indicator;
• added Chande Kroll Stop indicator;
• added WSMA (Wilder's Smoothing Average) method;
• modified AverageDirectionalIndex;
• added Detrendede Price Oscillator indicator;