FElupe: Finite Element Analysis

• Enhance Boundary: Select Points by value in addition to a callable (fx=lambda x: x == 0 is equivalent to fx=0), also add mode="and" and mode="or" argument.
• Support line elements within the revolution function mesh.revolve().
• Import previously hidden functions fun_items() and jac_items() as tools.fun() and tools.jac(), respectively (useful for numeric continuation).
• Add step- and substep-numbers as arguments to the callback(stepnumber, substepnumber, substep)-function of a Job.

• Enhance Boundary class by @adtzlr in https://github.com/adtzlr/felupe/pull/274
• Support Line-elements within mesh.revolve() by @adtzlr in https://github.com/adtzlr/felupe/pull/276
• Import fun_items() and jac_items() from felupe.tools._newton by @adtzlr in https://github.com/adtzlr/felupe/pull/277
• Docs: Add numeric continuation tutorial with contique by @adtzlr in https://github.com/adtzlr/felupe/pull/278
• Callback: Add args (step- and substep-numbers) by @adtzlr in https://github.com/adtzlr/felupe/pull/279

Full Changelog: https://github.com/adtzlr/felupe/compare/v5.0.0...v5.1.0