CHANGE_LOG

# 0.1.2
## Usage
* Now parsers are integrated into format
* Now most functions can be used through some traits provided. These are done by using dynamic
dispatch, so full struct may be shadowed. But this provide universal interface totally ignoring
32-bit and 64-bit differences.

## Internal
* macros are used when define the parser of elf 32 version and 64 version.
* Use trait to provide functionalities