[algorithms] add Newton algorithm
[operators] add 'jacobian' method
[operators.basic] move apply_inverse default impl to AssemblableOperatorBase
[operators.basic] bugfixes
[algorithms.newton] add options to return intermediate stages and residuals
[la.gram_schmidt] bugfix
[parameters.spaces] bugfix
update .gitignore
[algorithms.newton] fix typo
[operators.ei] allow interpolation of operators without 'restricted' method
[la.listvectorarray] bugfix
[operators.basic] improve default impl of jacobian()
[discretizations] allow solve() to take optional arguments
[operators.ei] bugfix
[algorithms.ei] return triangularity errors in ei_greedy()
[domaindescriptions] add missing __ne__ method to BoundaryType
add some __repr__ methods to prettify sphinx documentation
[algorithms.newton] add 'miniter' parameter
[algorithms.ei] add implementation of DEIM algorithm
[operators.basic] fix typos