update README

README.md

@@ -11,9 +11,9 @@
 
 * solves $N$-body problems governed by the Laplace ($1/r$) Green's function, with work planned to support the Helmholtz Green's function in the future
 * incorporates seamlessly into existing Julia code without modifications (just the addition of a few interface functions)
-* offers convenience functions for determining the expansion coefficients for multiple kernel functions including source points, vortex points, source panels, and dipole panels (this list is growing!)
+* offers fast, recursive convenience functions for determining the expansion coefficients for multiple kernel functions, including source, dipole, and vortex elements for point, filament, and panel geometries
 * provides velocity and velocity gradient (or their equivalent for non-fluids problems) obtained using analytic expressions (no finite difference or AD)
-* uses $\mathcal{O}(p^4)$ multipole-to-local translation operator (where $p$ is the expansion order) with more efficient methods under development
+* uses $\mathcal{O}(p^3)$ multipole-to-local translation operator (where $p$ is the expansion order)
 * automated CPU-parallelization of expansions and direct interactions
 * supports GPU-parallelization of direct interactions using [CUDA](https://github.com/JuliaGPU/CUDA.jl)
 * [ForwardDiff](https://github.com/JuliaDiff/ForwardDiff.jl) and [ReverseDiff](https://github.com/JuliaDiff/ReverseDiff.jl) compatible