Mecha

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))

Fix
* Small optimization and update tokenstream to get sorted explanations ([`510da71`](https://github.com/mcbeet/mecha/commit/510da716aec9b393733bcb13e186e2c93da23317))

Fix
* Make line mapping more compact ([`4044ce4`](https://github.com/mcbeet/mecha/commit/4044ce4355946f334c14e7b891aa4faf3a77bea1))

Feature
* Add import statements ([`970bd01`](https://github.com/mcbeet/mecha/commit/970bd017d8104ea2c54ebc85c2d2c58ffe735e9f))
* Inject context object ([`98e6727`](https://github.com/mcbeet/mecha/commit/98e672712819d37f34856a1fa5701157dc0cfbbe))
* Expose ctx ([`e1714f0`](https://github.com/mcbeet/mecha/commit/e1714f0bdb1fc473e3fecfe28818294bf4692501))
* Add yield statements ([`410e60a`](https://github.com/mcbeet/mecha/commit/410e60a35266ed5e66ca52a3c4aaa30064d26627))
* Add globals ([`7d934a2`](https://github.com/mcbeet/mecha/commit/7d934a20f82cad8b97f8126a03cee0a5e086227e))
* Tweak constraints and make it possible to convert tuples to ranges ([`f130359`](https://github.com/mcbeet/mecha/commit/f130359b5b3768b7dc9d59a46a24d9e808a30497))
* Add f-strings ([`88b12d2`](https://github.com/mcbeet/mecha/commit/88b12d2cf64296d8cb228d3817d9db8d93f727e2))
* Add tuples ([`80534e5`](https://github.com/mcbeet/mecha/commit/80534e5af70d2459aef4215b46912ecf5316e716))