docs(#44) Update Readme

README.md

@@ -302,6 +302,7 @@ To anonymize a database fields you may use a Go template with the [Sprig templat
 Additional filter functions:
 - `null`: set a field value to `NULL`
 - `isNull`: compare a field value with `NULL`
+- `drop`: drop whole row. If table has filters for several columns and at least one of them returns drop value, whole row will be skipped during the anonymization process
 
 You may also use the following data in a templates:
 - Current table name. Statement: `{{ .TableName }}`
@@ -504,10 +505,10 @@ It's easy.
 ## Roadmap
 
 Following features are already in backlog for our development team and will be released soon:
-- Global variables with the templated values you may use through the filters for all tables and columns
-- Ability to delete tables and rows from faked dump 
-- Ability to output into log a custom messages. It’s quite useful it order to obtain some generated data like admin passwords, etc
-- Support of a big variety of databases
+- [x] Global variables with the templated values you may use through the filters for all tables and columns
+- [x] Ability to delete tables and rows from faked dump 
+- [ ] Ability to output into log a custom messages. It’s quite useful it order to obtain some generated data like admin passwords, etc
+- [ ] Support of a big variety of databases
 
 ## Feedback