Update readme

Readme.md

@@ -1,21 +1,34 @@
+# begin
+
 This is a free implementation of the Cisco ios/asa/catalyst output modifier "begin" released under GNU GPL v.2 or any later version.
 
-http://www.cisco.com/en/US/docs/ios/preface/usingios.html#wp1012384
+[Cisco output modifiers manual](https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/fundamentals/configuration/15_sy/fundamentals-15-sy-book/cf-shw-cmd-out-redirect.pdf)
 
-DEPENDENCIES
+## DEPENDENCIES
 This program depends on boost/xpressive header only library as well as boost/iostreams. On RedHat(-ish) systems do:
 
+```bash
 yum install boost-devel
-
+```
 On debian do:
 
+```bash
 apt-get install libboost-regex-dev libboost-iostreams-dev
-
+```
 before installation
 
-INSTALLATION
-git clone git://github.com/mickenordin/begin.git
+## INSTALLATION
+
+```bash
+git clone https://code.smolnet.org/micke/begin.git
 cd begin
 meson build
 ninja -C build
 sudo ninja -C build install
+```
+
+## USAGE
+
+```
+begin [-z|-j] <regex> [filename]
+```