Integral basis work. Resolves Issue #10.
Integral basis work. Resolves Issue #10.

Abelfunctions can now compute integral bases of algebraic
function fields. The functionality is accessed via the
'integralbasis' module. The primary function is
'integral_basis'.

An entry in the test suite still needs to be written.
Additionally, the ability to compute Puiseux series up to
a degree bound, as opposed to specifying a number of terms,
will improve performance as well.

cswiercz/abelfunctions,cswiercz/abelfunctions,abelfunctions/abelfunctions,abelfunctions/abelfunctions,abelfunctions/abelfunctions,cswiercz/abelfunctions