lotus/utils — pull request #20 by jodosha (2014-07-07 09:48:12+00:00)
Title: Composition over inheritance

Please have a look at #14 for the rationale behind this choice.

Closes #14

## Benchmarks:
### String
#### Before (inheritance)

```
user system total real
#initialize 0.470000 0.000000 0.470000 ( 0.471006)
#classify 2.030000 0.070000 2.100000 ( 2.107922)
#underscore 5.450000 0.240000 5.690000 ( 5.706362)
#demodulize 0.570000 0.000000 0.570000 ( 0.577132)
#namespace 0.610000 0.000000 0.610000 ( 0.606817)
#tokenize 11.100000 0.560000 11.660000 ( 11.696167)
```

#### After (composition)

```
user system total real
#initialize 0.350000 0.000000 0.350000 ( 0.358805)
#classify 2.660000 0.050000 2.710000 ( 2.735694)
#underscore 6.800000 0.220000 7.020000 ( 7.059851)
#demodulize 1.030000 0.000000 1.030000 ( 1.031468)
#namespace 0.970000 0.000000 0.970000 ( 0.973875)
#tokenize 13.270000 0.600000 13.870000 ( 13.964012)
```