v3.4.0-p0: Hunterize OpenEXR

Hunterize OpenEXR

• add HunterGate v0.11.0
• add Hunter v0.26.4
• add Imath as dependency
• add libdeflate as depencency, introduced in v3.2.0
• no zlib dependency since v3.2.0, replaced by libdeflate
• add OpenJPH as dependency, since v3.4.0

---

internal_ht.cpp: fix OpenJPH includes for 0.23

OpenJPH 0.23.0 unified the include directories between cmake and
pkgconfig. Need to update the correpsonding includes to contain the
`openjph/` subfolder.

Corresponding PR:
https://github.com/AcademySoftwareFoundation/openexr/pull/2122

v3.1.5-p0

Update Hunter version

v3.1.4-p0

Update Hunter version

v3.1.0-p0

Hunterize OpenEXR

v3.0.1-p0

Merge pull request #4 from hjmallon/hunter-3.0.1

Hunterize 3.0.1

v2.5.1-p0

Merge pull request #3 from hjmallon/hunter-2.5.1

Hunterize OpenEXR

v2.4.0-p1

Merge pull request #2 from hjmallon/pr.hunterise-2.4.0

Hunterise OpenEXR

v2.4.0-p0

Merge pull request #1 from hjmallon/pr.hunter

Hunterize OpenEXR 2.4.0