Create plot support

### Why
We need to have exploratory plot support in order to visualize the results of our analyses.

### What
Implement support for at least the following types of graph:
- [ ] boxplot view per hour, where the data for each box are the water consumption values for that given hour for all recorded days
- [ ] concatenated view of all water consumption for a given costumer (i.e. concatenate all rows in one single large timeseries - useful for our seasonality analysis)
- [ ] plots for timeseries decomposition - view trend, seasonality and residual components

### Notes
To make visualization interactive, we will be using the [plotly](https://plot.ly/) library (install via [conda here](https://anaconda.org/plotly/plotly)).