add table with versions

CHANGELOG.md

 ## 21.03.0 (in progress)
 
  IMPROVEMENTS
-<<<<<<< HEAD
 * Producer API - queue limits in Python, for C++ return original data in error custom data      
 * Consumer API - add GetCurrentDatasetCount/get_current_dataset_count function with option to include or exclude incomplete datasets
 * Consumer API - GetStreamList/get_stream_list - can filter finished/unfinished streams now
 * Producer/Consumer API - StreamInfo structure/Python dictionary include more information (is stream finished or not, ...) 
 * Switch to JWT tokens (token has more symbols, expiration time, can be revoked and there are two type of tokens - with read/write access rights)
+* Improved versioning. Producer/Consumer API - introduce GetVersionInfo/get_version_info, compatiblity check between clients and server
 
 BREAKING CHANGES
 * Consumer API (C++ only)- GetStreamList has now extra argument StreamFilter
+* Consumer/Producer libraries need to be updated due to protocol changes
 
 ## 20.12.0
 

VERSIONS.md

+[Producer API](#producer-api) -
+[Consumer API](#consumer-api) - 
+[Producer Protocol](#producer-protocol) - 
+[Consumer Protocol](#consumer-protocol)
+
+
+### Producer API
+
+| Release      | API changed | Breaking changes | Protocol | Supported by server up to | Status |
+| ------------ | ----------- |----------------- | -------- | ------------------------- | ------- |
+| 21.03.0      | Yes         | No               | v0.1     | 21.03.0                   | Current version  |
+
+
+[Producer API](#producer-api) -
+[Consumer API](#consumer-api) - 
+[Producer Protocol](#producer-protocol) - 
+[Consumer Protocol](#consumer-protocol)
+
+
+### Consumer API
+
+| Release      | API changed | Breaking changes | Protocol | Supported by server up to | Status |
+| ------------ | ----------- |----------------- | -------- | ------------------------- | ------- |
+| 21.03.0      | Yes         | Yes              | v0.1     | 21.03.0                   | Current version  |
+
+
+[Producer API](#producer-api) -
+[Consumer API](#consumer-api) - 
+[Producer Protocol](#producer-protocol) - 
+[Consumer Protocol](#consumer-protocol)
+
+### Producer Protocol
+| Release      | Supported by client | Supported by server  | Status           |
+| ------------ | ------------------- | -------------------- | ---------------- |
+| v0.1         | 21.03.0 - 21.03.0   | 21.03.0  - 21.03.0   | Current version  |
+
+[Producer API](#producer-api) -
+[Consumer API](#consumer-api) - 
+[Producer Protocol](#producer-protocol) - 
+[Consumer Protocol](#consumer-protocol)
+
+
+### Consumer Protocol
+| Release      | Supported by client | Supported by server  | Status           |
+| ------------ | ------------------- | -------------------- | ---------------- |
+| v0.1         | 21.03.0 - 21.03.0   | 21.03.0  - 21.03.0   | Current version  |
+
+[Producer API](#producer-api) -
+[Consumer API](#consumer-api) - 
+[Producer Protocol](#producer-protocol) - 
+[Consumer Protocol](#consumer-protocol)