joseLuís b12abeddc9 rust: finish NcDirect error system refactor
- change Option return type for NcResult when appropriate.
- make NcDirect constructors return NcResult.
- rename NcError::new() to with_msg() and simplify new().
- refactor examples:
  - rename direct-image.rs to direct-image-c.rs
  - recreate using rust methods, as direct-image-rust.rs
  - differentiate more throughly between both styles.
  - remove the sys namespace on both examples.
2020-12-25 17:41:02 +01:00
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2020-12-16 23:15:29 +01:00
2020-08-17 17:54:07 +02:00