cleanup readme

Author: computerality

README.md

@@ -1,10 +1,27 @@
 # pyevmasm
 
-pyevm is an assembler and disassembler library for the Ethereum Virtual Machine (EVM). pyevmasm supports python 2.7 and python 3.6 and newer. It also includes a convenient commandline tool `evmasm`.
+pyevmasm is an assembler and disassembler library for the Ethereum Virtual Machine (EVM). pyevmasm supports python 2.7 and newer. 
 
-New issues, feature requests, and contributions are welcome. Join us in #ethereum on the [Empire Hacking Slack](https://empireslacking.herokuapp.com) to discuss Ethereum security tool development.
+This library is currently new and under development.
 
-This tool is currently new and under development.
+New issues, feature requests, and contributions are welcome. Join us in #ethereum channel on the [Empire Hacking Slack](https://empireslacking.herokuapp.com) to discuss Ethereum security tool development.
+
+# evmasm
+evmasm is a commandline utility that uses pyevmasm to assemble or disassemble EVM. Below is an example of disassembling the preamble of compiled contract.
+
+```
+$ echo -n "608060405260043610603f57600035" | evmasm -d
+00000000: PUSH1 0x80
+00000002: PUSH1 0x40
+00000004: MSTORE
+00000005: PUSH1 0x4
+00000007: CALLDATASIZE
+00000008: LT
+00000009: PUSH1 0x3f
+0000000b: JUMPI
+0000000c: PUSH1 0x0
+0000000e: CALLDATALOAD
+```
 
 # Installation