docs: improve README a tiny bit

Author: isimluk

README.md

@@ -15,13 +15,29 @@ Did you ever got to implement XML parser? Perhaps for atom, or scap? You may hav
 cool to automatically generate XML parser based on XSD definition? That's exactly what we
 are up to here.
 
-### Related projects:
- - ![Metaschema](https://github.com/gocomply/metaschema) - generate golang code based on NIST metaschema input
- - ![SCAP](https://github.com/gocomply/scap) - parsers of NIST SCAP family of standards
+## Installation
 
-## Exemplary Usage
+```shell
+go install github.com/gocomply/xsd2go/cli/gocomply_xsd2go@latest
+```
+
+## Usage
+
+```
+gocomply_xsd2go convert --help
+NAME:
+   gocomply_xsd2go convert - convert XSD to golang code to parse xml files generated by given xsd
+
+USAGE:
+   gocomply_xsd2go convert [command options] XSD-FILE GO-MODULE-IMPORT OUTPUT-DIR
 
+OPTIONS:
+   --xmlns-override value  Allows to explicitly set gopackage name for given XMLNS. Example: --xmlns-override='http://www.w3.org/2000/09/xmldsig#=xml_signatures'
 ```
+
+## Exemplary Usage
+
+```shell
 # Acquire latest some XSD file you want to convert - for instance XCCDF 1.2
 git clone --depth 1 https://github.com/openscap/openscap
 # Parse XSD schema and generate golang structs
@@ -31,8 +47,6 @@ git clone --depth 1 https://github.com/openscap/openscap
     github.com/gocomply/scap pkg/scap/models
 ```
 
-## Installation
-
-```
-go get -u -v github.com/gocomply/xsd2go/cli/gocomply_xsd2go
-```
+### Related projects:
+ - ![Metaschema](https://github.com/gocomply/metaschema) - generate golang code based on NIST metaschema input
+ - ![SCAP](https://github.com/gocomply/scap) - parsers of NIST SCAP family of standards