Write a function ```convert_temp(temp, from_scale, to_scale)``` converting temperature from one scale to another. 
Return converted temp value. 
Round converted temp value to an integer(!).
Reading: http://en.wikipedia.org/wiki/Conversion_of_units_of_temperature
```
possible scale inputs:
    "C"  for Celsius
    "F"  for Fahrenheit
    "K"  for Kelvin
    "R"  for Rankine
    "De" for Delisle
    "N"  for Newton
    "Re" for Réaumur
    "Ro" for Rømer
```
```temp``` is a number, ```from_scale``` and ```to_scale``` are strings. 
```python
convert_temp(   100, "C",  "F") # => 212
convert_temp(    40, "Re", "C") # => 50
convert_temp(    60, "De", "F") # => 140
convert_temp(373.15, "K",  "N") # => 33
convert_temp(   666, "K",  "K") # => 666
```
convertToC = {'C':lambda t: t, 'F':lambda t: (t - 32) * 5 / 9, 'K':lambda t: t - 273.15, 'R':lambda t: (t - 491.67) * 5 / 9,
              'De':lambda t: 100 - t * 2 / 3, 'N':lambda t: t * 100 / 33, 'Re':lambda t: t * 5 / 4, 'Ro':lambda t: (t - 7.5) * 40 / 21}
convertFromC = {'C':lambda t: t, 'F':lambda t: t * 9 / 5 + 32, 'K':lambda t: t + 273.15, 'R':lambda t: (t + 273.15) * 9 / 5,
                'De':lambda t: (100 - t) * 3 / 2, 'N':lambda t: t * 33 / 100, 'Re':lambda t: t * 4 / 5, 'Ro':lambda t: t * 21 / 40 + 7.5}
def convert_temp(temp, from_scale, to_scale):
  return round(convertFromC[to_scale](convertToC[from_scale](temp)))
convertToC = {'C':lambda t: t, 'F':lambda t: (t - 32) * 5 / 9, 'K':lambda t: t - 273.15, 'R':lambda t: (t - 491.67) * 5 / 9,
              'De':lambda t: 100 - t * 2 / 3, 'N':lambda t: t * 100 / 33, 'Re':lambda t: t * 5 / 4, 'Ro':lambda t: (t - 7.5) * 40 / 21}
convertFromC = {'C':lambda t: t, 'F':lambda t: t * 9 / 5 + 32, 'K':lambda t: t + 273.15, 'R':lambda t: (t + 273.15) * 9 / 5,
                'De':lambda t: (100 - t) * 3 / 2, 'N':lambda t: t * 33 / 100, 'Re':lambda t: t * 4 / 5, 'Ro':lambda t: t * 21 / 40 + 7.5}
def convert_temp(temp, from_scale, to_scale):
  return round(convertFromC[to_scale](convertToC[from_scale](temp)))