Swarmlib

Fixed
* a bug in the ACO algorithm that chose the next node by its maximal attractiveness. Now the next node is chosen randomly weighted by its attractiveness

[All Changes](https://github.com/HaaLeo/swarmlib/compare/v0.3.0...v0.3.1)

Added
* command line option `--continuous` for the firefly algorithm to indicate, whether the algorithm should run continuously or not
* logging for the current best and overall best intensity found of the firefly algorithm

[All Changes](https://github.com/HaaLeo/swarmlib/compare/v0.2.0...v0.3.0)

Added
* a feature that enables the _firefly algorithm_ for one of the provided 2D functions. After each step the intermediate solution is plotted.

[All Changes](https://github.com/HaaLeo/swarmlib/compare/v0.1.0...v0.2.0)

Added
* a feature that performs [2-opt](https://en.wikipedia.org/wiki/2-opt) search once on each partial solution after each iteration. It can be disabled via the argument `--two-opt false`.

Fixed
* an import bug that caused the application to crash instantly

[All Changes](https://github.com/HaaLeo/swarmlib/compare/v0.0.1...v0.1.0)

**Initial Release**

Added
* a feature that enables solving the Traveling Salesman Problem using the _Ant Colony Optimization_ approach and plots the result afterwards