Fix/tweak numbers implementation

Round fixed point decimals in initialiser to match Python behaviour
Add pretty printing for Python

pyRCV2/numbers/fixed_js.py

@@ -28,7 +28,7 @@ class Fixed:
 		if isinstance(val, Fixed):
 			self.impl = val.impl
 		else:
-			self.impl = Big(val)
+			self.impl = Big(val).round(Big.DP)
 	
 	def pp(self, dp):
 		"""Pretty print to specified number of decimal places"""

pyRCV2/numbers/fixed_py.py

@@ -34,6 +34,8 @@ class Fixed:
 		else:
 			self.impl = Decimal(val).quantize(_quantize_exp)
 	
+	def __repr__(self):
+		return '<Fixed {}>'.format(str(self.impl))
 	def pp(self, dp):
 		"""Pretty print to specified number of decimal places"""
 		return format(self.impl, '.{}f'.format(dp))

pyRCV2/numbers/native_py.py

@@ -27,6 +27,8 @@ class Native:
 		else:
 			self.impl = float(val)
 	
+	def __repr__(self):
+		return '<Native {}>'.format(str(self.impl))
 	def pp(self, dp):
 		"""Pretty print to specified number of decimal places"""
 		return format(self.impl, '.{}f'.format(dp))

pyRCV2/numbers/rational_py.py

@@ -28,6 +28,8 @@ class Rational:
 		else:
 			self.impl = Fraction(val)
 	
+	def __repr__(self):
+		return '<Rational {}>'.format(str(self.impl))
 	def pp(self, dp):
 		"""
 		Pretty print to specified number of decimal places