Pfp

Random fuzzing fixes

| type | ticket | description |
|------|------------------------------------------------------|------------------------------|
| bug | [131](https://github.com/d0c-s4vage/pfp/issues/131) | Random fuzzing-related fixes |

Added `--show-offsets` CLI argument, fixed

| type | ticket | description |
|---------|------------------------------------------------------|-----------------------------------------------|
| feature | [129](https://github.com/d0c-s4vage/pfp/issues/129) | Show offsets via CLI with parsed fields |
| bug | [127](https://github.com/d0c-s4vage/pfp/issues/127) | Made short circuiting with logical ORs lazier |

One fix and one feature suggestion from bannsec about iterate child elements

| type | ticket | description |
|---------|------------------------------------------------------|-------------------------------------------------|
| bug | [125](https://github.com/d0c-s4vage/pfp/issues/125) | Fixes implicit arrays invalid behavior |
| feature | [123](https://github.com/d0c-s4vage/pfp/issues/123) | Adds `__iter__` for Structs, Unions, and Arrays |

Pretty big fixes, should make pfp a *lot* more compatible with existing
010 Editor templates (DEX.bt works now for parsing!)

| type | ticket | description |
|------|------------------------------------------------------|--------------------------------------------------|
| bug | [120](https://github.com/d0c-s4vage/pfp/issues/120) | Fixes integer promotion problems, part deux |
| bug | [115](https://github.com/d0c-s4vage/pfp/issues/115) | Fixes problem with chained assignments |
| bug | [113](https://github.com/d0c-s4vage/pfp/issues/113) | Error with `_pfp__parse` and `set_val` parameter |

Consecutive duplicate arrays are now fully supported

| type | ticket | description |
|-----:|------------------------------------------------------|-----------------------------------------------|
| bug | [110](https://github.com/d0c-s4vage/pfp/issues/110) | Adds support for consecutive duplicate arrays |

MP4.bt works now!

| type | ticket | description |
|-----:|------------------------------------------------------|--------------------|
| bug | [100](https://github.com/d0c-s4vage/pfp/issues/100) | Implemented Memcmp |