a bit of work on conversion functions

Readme.md

@@ -4,8 +4,17 @@ compare in row.cpp shoud take into account m_visible
 ### TODO
 - create local_install.sh
 
+
+- change float type keyword to double and in code functions too
+
+- add functions:
+	- coalesce
+	- now
+	- rtrim, ltrim, rpad, lpad
+	- round
+
 - set xxx - without value to reset to default value
-- coalesce, date functions now; string functions rtrim, ltrim, rpad, lpad; math function round
+
 - add pipe | concatenation
 - add support for 1_000_000 numbers
 - expand_asterix_char should support multiple and everywhere *