Mecha

Feature
* Add mecha.contrib.statistics and --stats option ([`eaf28a1`](https://github.com/mcbeet/mecha/commit/eaf28a1963de9b0c9331b00aaab8aad45b20dea8))

Feature
* Add nesting for schedule command ([`eeb15f6`](https://github.com/mcbeet/mecha/commit/eeb15f6c007f69e8323fabfc768bc30e80d8150c))

Fix
* Only call nestde functions behind execute ([`0096cce`](https://github.com/mcbeet/mecha/commit/0096cce671b34cfa5a4774d4ae9e4ce2d92f2dff))

Fix
* Default to 1.18 ([`4362542`](https://github.com/mcbeet/mecha/commit/4362542f116c9cdab318d248293743025e08027e))

Feature
* Add python colon ([`14fa47b`](https://github.com/mcbeet/mecha/commit/14fa47b9a7a3f2f6eaa88b6927116292f0480b8d))

Feature
* Lower elif statements ([`c49122f`](https://github.com/mcbeet/mecha/commit/c49122fe4aa37f042d81c66e6572b3206efe62c5))

Fix
* Edge-case for optional resource locations ([`a55b3d6`](https://github.com/mcbeet/mecha/commit/a55b3d60a4331eabb92fe1b2f5e6da8d51f08251))

Fix
* Handle block_marker particles ([`25bc124`](https://github.com/mcbeet/mecha/commit/25bc124ae6c9ab76ecea3204b512327e1d999bd5))
* Shallow codegen snapshots ([`28d8696`](https://github.com/mcbeet/mecha/commit/28d8696f4946ac3da7dcf64f5644287e5057970a))
* Use specialized nodes for literals ([`676fc54`](https://github.com/mcbeet/mecha/commit/676fc54ce3328917e50451f30ea85271e803c865))