[#74] Update readme file

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

README.md

@@ -11,13 +11,14 @@
 
 NeoFS-Contract contains all NeoFS related contracts written for
 [neo-go](https://github.com/nspcc-dev/neo-go) compiler. These contracts
-are deployed both in mainnet and sidechain.
+are deployed both in main chain and side chain.
 
-Mainnet contract:
+Main chain contracts:
 
 - neofs
+- processing
 
-Sidechain contracts:
+Side chain contracts:
 
 - alphabet
 - audit
@@ -34,7 +35,7 @@ Sidechain contracts:
 
 To compile smart contracts you need:
 
--   [neo-go](https://github.com/nspcc-dev/neo-go) >= 0.94.0
+-   [neo-go](https://github.com/nspcc-dev/neo-go) >= 0.94.1
 
 ## Compilation
 
@@ -53,6 +54,7 @@ neo-go contract compile -i netmap/netmap_contract.go -c netmap/config.yml -m net
 neo-go contract compile -i proxy/proxy_contract.go -c proxy/config.yml -m proxy/config.json
 neo-go contract compile -i reputation/reputation_contract.go -c reputation/config.yml -m reputation/config.json
 neo-go contract compile -i neofs/neofs_contract.go -c neofs/config.yml -m neofs/config.json
+neo-go contract compile -i processing/processing_contract.go -c processing/config.yml -m processing/config.json
 ```
 
 You can specify path to the `neo-go` binary with `NEOGO` environment variable: