Minor fixes
Bump version to 0.75.0
Add experimental path caching
Fix enum
Use HOMEPATH instead of Path
Set right harness working directory
Minor fixes
Implement experimental caching
Generalize caching via parse_template
Switch from buffers to strings for Python
Refactor parse state; add per-thread/process cache
Add fixed_buffer constructor
Cache fixes
Fix caching test
Make options dict optional in Python
Document caching option
Unnest caching enum
Fix stream_template key_type
Fix python harness