strategies

Filtering strategies, as classes.

Classes

`AllValueFilterStrategy`	Filters multi-rows having at least all the requested values.
`AnyValueFilterStrategy`	Filters multi-rows having at least one of the requested values.
`HavingValueFilterStrategy`	ValueStrategy for filtering, keeping all the rows with one of the imposed values on the selected column.
`InRangeFilterStrategy`	Strategy to filter rows in dataframe having values in a certain range.
`NotInRangeFilterStrategy`	Strategy to filter rows in dataframe having values out of a certain range.
`RangeFilterStrategy`	Strategy to filter rows in dataframe depending on a range of values.
`ValueFilterStrategy`	Strategy to filter rows in dataframe depending on a set of values.