v0.1.15

LightOSM v0.1.15

Diff since v0.1.14

Merged pull requests:

• Allow different weight matrices to be passed in for path weight calculations (#40) (@mmiller-max)
• Add example stub for unit tests and stop download failures from breaking unit tests (#41) (@mmiller-max)
• Stop shortest path returning no path when destination node is reached on suboptimal path (#42) (@mmiller-max)