fixed passing status

Allow multiple window sizes for zlib compression in PNG.

Made tests pass again

Random fuzzing fixes

| type | ticket                                               | description                  |
|------|------------------------------------------------------|------------------------------|
| bug  | [#131](d0c-s4vage/pfp#131) | Random fuzzing-related fixes |

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

| type    | ticket                                               | description                                   |
|---------|------------------------------------------------------|-----------------------------------------------|
| feature | [#129](d0c-s4vage/pfp#129) | Show offsets via CLI with parsed fields       |
| bug     | [#127](d0c-s4vage/pfp#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](d0c-s4vage/pfp#125) | Fixes implicit arrays invalid behavior          |
| feature | [#123](d0c-s4vage/pfp#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](d0c-s4vage/pfp#120) | Fixes integer promotion problems, part deux      |
| bug  | [#115](d0c-s4vage/pfp#115) | Fixes problem with chained assignments           |
| bug  | [#113](d0c-s4vage/pfp#113) | Error with `_pfp__parse` and `set_val` parameter |

Consecutive duplicate arrays are now fully supported

| type | ticket                                               | description                                   |
|-----:|------------------------------------------------------|-----------------------------------------------|
|  bug | [#110](d0c-s4vage/pfp#110) | Adds support for consecutive duplicate arrays |

MP4.bt works now!

| type | ticket                                               | description        |
|-----:|------------------------------------------------------|--------------------|
|  bug | [#100](d0c-s4vage/pfp#100) | Implemented Memcmp |

Merge pull request #99 from d0c-s4vage/hotfix/98-typedefd_structs_wit…

…h_params

Adds tests for typedef'd parameterized structs