Update README.md

Author: defunctio

README.md

@@ -1,14 +1,58 @@
 # pyevmasm
 
-pyevmasm is an assembler and disassembler library for the Ethereum Virtual Machine (EVM). pyevmasm supports python 2.7 and newer. 
+pyevmasm is an assembler and disassembler library for the Ethereum Virtual Machine (EVM). pyevmasm supports python 2.7 and newer. You can find the documentation [here](rtdlink).
 
 This library 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.
 
+
+Example;
+```
+>>> from pyevmasm import instruction_table, disassemble_hex, disassemble_all, assemble_hex
+>>> instruction_table[20]
+Instruction(0x14, 'EQ', 0, 2, 1, 3, 'Equality comparision.', None, 0)
+>>> instruction_table['EQ']
+Instruction(0x14, 'EQ', 0, 2, 1, 3, 'Equality comparision.', None, 0)
+>>> instrs = list(disassemble_all(binascii.unhexlify('608060405260043610603f57600035')))
+>>> instrs.insert(1, instruction_table['JUMPI'])
+>>> a = assemble_hex(instrs)
+>>> a
+'0x60805760405260043610603f57600035'
+>>> print(disassemble_hex(a))
+PUSH1 0x80
+JUMPI
+PUSH1 0x40
+MSTORE
+...
+>>> assemble_hex('PUSH1 0x40\nMSTORE\n')
+'0x604052'
+```
+
 # 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.
+evmasm is a commandline utility that uses pyevmasm to assemble or disassemble EVM.
+
+```
+usage: evmasm [-h] (-a | -d | -t) [-bi] [-bo] [-i [INPUT]] [-o [OUTPUT]]
+
+pyevmasm the EVM assembler and disassembler
+
+optional arguments:
+  -h, --help            show this help message and exit
+  -a, --assemble        Assemble EVM instructions to opcodes
+  -d, --disassemble     Disassemble EVM to opcodes
+  -t, --print-opcode-table
+                        List supported EVM opcodes
+  -bi, --binary-input   Binary input mode (-d only)
+  -bo, --binary-output  Binary output mode (-a only)
+  -i [INPUT], --input [INPUT]
+                        Input file, default=stdin
+  -o [OUTPUT], --output [OUTPUT]
+                        Output file, default=stdout
+```
+
 
+Example; disassembling the preamble of compiled contract.
 ```
 $ echo -n "608060405260043610603f57600035" | evmasm -d
 00000000: PUSH1 0x80