* Adding -M# operation modifier documentation

* Adding long name, typo and update desc

Use statbuf->st_mtim Again

[fuzz] Adding bool to check if there is enough room to emit noCompress Superblocks

Add Support for Dictionaries in Corruption Diagnosis Tool

added ppc64le tests on travis

on real hardware

[fuzz] Superblock fuzz issues

Make idiomatic cmake install so third party cmake installers work right.

Fixes new fuzz issue

Credit to OSS-Fuzz

* Initializing unsigned value

* Initialilzing to 1 instead of 0 because its more conservative

* Unconditionoally setting to check first and then checking zero

* Moving bool to before block for c90

* Move check set before block

so that potential issue report do not confuse `dev` with latest release

Add Tool to Diagnose Whether Corrupt Blobs are Plausibly Bit-Flips

Check for fread failure

small refactoring : remove global variable g_displayOut

displaying into stderr or stdout is now an explicit operation,
no longer depending on some global state set elsewhere in the code.

fix recent issue combining -r with empty list of input files

This would resize the table of input filenames to zero,
delivering an empty table,
to which it was no longer possible to add stdin.

mingw cross compilation test

Fix MinGW cross

- only compiles zstd CLI
- enforces zero warning tolerance policy

note : mingw compilation of the library complains (warning) about -fPIC flag.
It mostly ignores it, so it's not a big issue.
Still, it would need to be fixed if library cross-compilation becomes part of CI.
At this stage, it's unclear if this is a scenario.