Implement Series() functions

[axkr]

Implement

• ComposeSeries()
• InverseSeries()
• Normal()
• Series()
• SeriesCoefficient()
• SeriesData()

functions in class org.matheclipse.core.builtin.SeriesFunctions

• Allow differentiation of series in D()
• Allow integration of series in Integrate()

You can set org.matheclipse.core.basic.ToggleFeature#SERIES = false to disable the Series() functions which are in a very early alpha state at the moment.

TODO:

• implement denominator parameter in SeriesData (ASTSeriesData.java)
• handle positive/negative fractional powers

Series(Sqrt(f(x)), {x, 0, n})
Series(f(x)^(-1/10), {x, 0, n})