Add readme. Fix mamba call #67

Job	Run time
Check RST syntax	11s
Check for syntax errors	11s
Build sampledata archives	4m 44s
Run Workbench Tests (windows-latest)	8m 11s
Run model tests (3.8, windows-latest)	11m 48s
Build binaries (macos-13)	16m 44s
Run Workbench Tests (macos-13)	7m 2s
Run model tests (3.8, macos-13)	9m 31s
Build binaries (windows-latest)	19m 15s
Run model tests (3.9, windows-latest)	7m 53s
Run model tests (3.9, macos-13)	8m 54s
Check sdist (3.8, windows-latest)	3m 6s
Validate Sampledata & User Guide	5m 28s
Run model tests (3.10, windows-latest)	9m 2s
Check sdist (3.8, macos-13)	1s
Run model tests (3.10, macos-13)	9m 9s
Check sdist (3.9, windows-latest)	3m 23s
Run model tests (3.11, windows-latest)	8m 6s
Check sdist (3.9, macos-13)	1s
Run model tests (3.11, macos-13)	7m 42s
Check sdist (3.10, windows-latest)	5m 9s
Run model tests (3.12, windows-latest)	9m 17s
Check sdist (3.10, macos-13)	2m 3s
Run model tests (3.12, macos-13)	10m 20s
Check sdist (3.11, windows-latest)	2m 31s
Check sdist (3.11, macos-13)	1s
Check sdist (3.12, windows-latest)	3m 13s
Check sdist (3.12, macos-13)	1s
	2h 52m 57s

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