Add a changelog section to the README.

README.md

@@ -19,6 +19,97 @@ resol-vbus = "0.3"
 ```
 
 
+## Changelog
+
+### Work in progress for Version 0.3.0
+
+- **[BREAKING CHANGE]**: Update chrono dependency and MSRV.
+    In an effort to prepare and cleanup their API for the next semver release, the new version of chrono raised their MSRV and deprecated a couple of functions that were previously used by our examples and tests.
+
+
+### Version 0.2.1
+
+- Implement `std::io::{Read,Write}` for `BlobBuffer`.
+- Add `get_{ref,mut}` functions to several `...Reader` structs.
+- Add `utils::current_timestamp` function and use it.
+- Add `SpecificationFile#convert_value` function.
+- Add `SpecificationFile#unit_by_unit_code` function.
+- Add some convenience functions to `Specification`.
+- Fix timezone bug in `Specification::fmt_timestamp`.
+- Update VBus specification file.
+- Add channel support to `LiveDataRecordingReader`.
+- Several bugfixes and other improvements to code and documentation.
+
+
+### Version 0.2.0
+
+- **[BREAKING CHANGE]**: Rename `to_id_string` to `id_string`.
+- **[BREAKING CHANGE]**: Replace `Arc` with `Rc` in `Specification` type.
+- **[BREAKING CHANGE]**: Reexport less from `specification` module, instead export itself.
+- **[BREAKING CHANGE]**: Rename `get_power_of_10` to `power_of_ten_f64`.
+- **[BREAKING CHANGE]**: Change `Specification`'s `raw_value` handling from `f64` to `i64`.
+- **[BREAKING CHANGE]**: Rename `get_raw_value_{i64,f64}` methods to `raw_value_{i64,f64}`.
+- Add `Specification::fields_in_data_set` function.
+- Add `AsRef<Header>` and `AsRef<[Data]>` implementations.
+- Add `DataSet::clear_packets_older_than` function.
+- Add `BlobReader::to_inner` function.
+- Add `specification::power_of_ten_i64` function.
+- Add and use `RawValueFormatter` type with improved l10n support.
+- Add `DataSet::clear_all_packets` function.
+- Add `Data::{is,into}_{packet,datagram,telegram}` functions.
+- Add `SpecificationFile::new_default` function.
+- Add `Datagram` support to `recording_decoder` modules.
+- Add `recording_encoder` module.
+- Add `DataSet::{iter,iter_mut}` functions.
+- Add `DataSet::sort_by` function.
+- Add `RecordingWriter` type.
+- Add `LiveDataRecordingWriter` type.
+- Add `Specification::fmt_timestamp` function.
+- Add `Data::as_{packet,datagram,telegram}` functions.
+- Add `IdHash` trait and `id_hash` function.
+- Add `IdHash` impls for `Packet`, `Datagram` and `Telegram` types.
+- Add `IdHash` impls for `Data` and `DataSet` types.
+- Add `DataSet#len` function.
+- Add `Packet#valid_frame_data{,_mut,_len}` functions.
+- Add `PacketId` and `PacketFieldId` types.
+- Add `ToPacketId` impl for `Packet` type.
+- Add `Specification#get_packet_spec_by_id` function.
+- Add `PacketSpec#get_field_spec{,_by}_position` functions.
+- Export `{,To}Packet{,Field}Id` types and traits as well as `chrono` mod.
+- Add `Telegram#valid_frame_data{,_mut,_len}` functions.
+- Add timestamp based filtering to `LiveDataRecordingReader`.
+- Add `DataSet::remove_all_data` function.
+- Add `DataSet::sort_by_id_slice` function.
+- Add `DataSetPacketField::{packet_id,packet_field_id}` functions.
+- Add `new` and `field_id` functions to `DataSetPacketField`.
+- Add optional support for min and max timestamps for `RecordingReader`.
+- Add `get_ref` and `get_mut` methods to several `...Writer` structs.
+- Add `offset` method to `BlobReader`.
+- Add `offset` methods to `LiveDataRecordingReader` and `RecordingReader`.
+- Add `LiveDataRecordingReader#read_to_stats`.
+- Add `BlobBuffer`.
+- Add `LiveDataBuffer`.
+- Add `AsRef` and `AsMut` impls to `LiveDataWriter`.
+- Add `Error` and `Result` types and use them throughout the library.
+- Add `Default` impl for `Header` struct.
+- Update integrated VBus specification file to datecode 20181220.
+- Update chrono dependency to 0.4.
+- Update to Rust edition 2018, apply cargo-fmt and cargo-clippy.
+- Several bugfixes and other improvements to code and documentation.
+
+
+### Version 0.1.1
+
+- **[BREAKING CHANGE]**: Publicly re-exported symbols from the `specification_file` module
+    Previously we re-exported every symbol from the `specification_file` module on the crate level, unnecessarily cluttering the library's namespace. This has been corrected in this version, only re-exporting `SpecificationFile`, `Language` and exporting the `specification_file` module itself. Under normal circumstances this change would result in a semver version bump, but since 0.1.0 was only released today, I hope nobody else is impacted.
+- Add `LiveDataRecordingReader`.
+
+
+### Version 0.1.0
+
+First public release.
+
+
 ## Contributors
 
 - [Daniel Wippermann](https://github.com/danielwippermann)