Version 0.10.0

Also available on pypi: pip install Algebra-with-SymPy==0.10.0

• Documentation updates and fixes.
• Significantly increased test coverage (~98%).
• Support for Eqn.rewrite(Add)
• Solving (e.g. solve(Eqn,x)) now supported fully. Still experimental.
• Bug fix: latex printing now supports custom printer.
• Substitution into an Equation using Equations is now supported (e.g. eq1.subs(eq2, eq3, ...)).
• algebra_with_sympy.version is now available for version checking within python.
• Bug fix: preparsing for =@ syntax no longer blocks obj? syntax for getting docstrings in ipython.
• More robust determination of equation names for labeling.