Implement compositional inverses of cycle index series
Remove spurious whitespace from end of compositional_inverse
Merge branch 'develop' into cis/compinv
trac 8828: initial commit
trac 8828: small rebasing  edit to make tests pass
trac 8828: work in progress
8828 - Lower bound on canonical height for elliptic curves.
Merge branch 'ticket/8828' into heights

Conflicts:
	src/module_list.py
	src/sage/schemes/elliptic_curves/height.py
	src/sage/schemes/elliptic_curves/period_lattice_region.pyx
Document and test most of period lattice region.
Merge branch 'u/robertwb/ticket/8828' of git://trac.sagemath.org/sage into trac8828
Merge branch 'develop' into trac8828
Merge branch 'develop' into trac8828
Improved caching for orders in number fields.

This makes orders unique parents.
Trac#8828: finished adding docs and tests to elliptic_curves/height.py
Trac#8828: finished adding docs and tests to elliptic_curves/period_lattice_region
reviewer patch
allow prec=Infinity in RationalField.places()
replace RR by RDF
simplify wp_c()
add documentation