[doc] rework description and complete README

Cargo.toml

@@ -2,7 +2,7 @@
 name = "dup-crypto"
 version = "0.9.0"
 authors = ["elois <c@elo.tf>"]
-description = "Manage cryptographic operations for DUPs (DUniter Protocols)."
+description = "Manage cryptographic operations for DUniter Protocols and the Duniter eco-system most broadly."
 repository = "https://git.duniter.org/libs/dup-crypto-rs"
 readme = "README.md"
 keywords = ["keys", "cryptography", "duniter", "dunitrust"]

README.md

@@ -4,7 +4,9 @@
 [![codecov](https://codecov.io/gh/duniter/dup-crypto-rs/branch/dev/graph/badge.svg)](https://codecov.io/gh/duniter/dup-crypto-rs)
 [![Minimum rustc version](https://img.shields.io/badge/rustc-1.41.0+-yellow.svg)](https://github.com/rust-lang/rust/blob/master/RELEASES.md)
 
-Cryptographic toolkit for the DUBP(1) and DUNP(2) protocols.
+Manage cryptographic operations for DUniter Protocols and the Duniter eco-system most broadly.
+
+`DUP` means DUniter Protocols.
 
 (1): DUniter Blockchain Protocol  
 (2): DUniter Network Protocol
@@ -17,3 +19,14 @@ Cryptographic toolkit for the DUBP(1) and DUNP(2) protocols.
 * Secure random byte generation
 * Scrypt to generate seed from credentials.
 * Ed25519 functions to create and use ed25519 keypair.
+* [DEWIF](https://git.duniter.org/nodes/common/doc/blob/dewif/rfc/0013_Duniter_Encrypted_Wallet_Import_Format.md) format read/write
+
+## Documentation
+
+Generated documentation : https://docs.rs/dup-crypto
+
+This documentation contains examples of code whose validity is assured (all code in the documentation is compiled on continuous integration).
+
+## Support
+
+If this library serves you well, you can make a donation on my Ğ1 public key `D9D2zaJoWYWveii1JRYLVK3J4Z7ZH3QczoKrnQeiM6mx`.

src/lib.rs

@@ -13,7 +13,10 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-//! Manage cryptographic operations.
+//! Manage cryptographic operations for DUniter Protocols and the Duniter eco-system most broadly.
+//!
+//! `dup` means DUniter Protocols.
+//!
 
 #![deny(
     clippy::option_unwrap_used,