v1.1.0

Major refinement since last release. Updates include:

• Added cracked moment of inertia calculations (Icr): section.calculate_Icr(), plotter.plot_Icr()
• More robust solver. Fixed convergence issue at low curvature.
• Added method to bulk export all fiber stress/strain data: section.get_all_fiber_data()
• Refined documentations and removed bulky files.
• Removed scipy dependency. Using simple secant method solver now.
• Updated docstring of all public methods
• Simplified requirement.txt

Full Changelog: v1.0.0...v1.1.0