Fix saveat

there was a hotfix to saveat which had a slight mistake. Necessary patch.

0.6 compatibility

v1.2.0

Update REQUIRE

Integrator Interface Improvement

The integrator interface was improved to be fully compatible with MultiScaleArrays

DataArrays and Variable Rate Jump Compatibility

This patch contains bugfixes which allow for data array and variable rate jump compatibility.

Performance Improvements

Usage of the muladd macro and dense searching lead to pretty good performance improvements.

Integrator and Callback Interfaces

This implements the integrator and callback interfaces for stochastic differential equation solvers. It also includes a novel (the first!) event handling implementation which makes use of the RSwM algorithm to do the time reversal. Also implements interpolations and the enhanced interpolations, and many performance improvements.

Patches and move Monte Carlo

Monte Carlo libraries were moved to a separate package to be generalized.