PS1 / PSF fixes (#543)

* loosen the VGMSampColl heuristic as it resulted in a false negative for philosoma
* clamp vab pitch tune to 127, as this fixes megaman8 and is consistent with gocha's comment
* PSFLoader: search for additional psflib files using starting at _lib2 tag (not _lib1) per the spec
* reject PSXSampColls that are 32 bytes or less
* RawFile: add containedVGMFilesOfType<>()
* HOSAScanner: prevent detecting duplicate PSXSampColls
* add file size checks to various Loaders
* fix SF2 conversion disallowing bank 128, which is the ch 10 drumkit bank

Fix typo in Cirrus workflow

Add Appvayor build script for Windows WTL build

Fix fatal regression of Super Mario World

Upgrade Visual Studio solution file (WTL; to VS2015)

Add Tamsoft PS1 formats to README

- adding a travis.yml config that successfully builds for osx

Fix Master Volume SysEx

Revert the last change to SeqTrack::IsOffsetUsed, fix Mega Man X Flam…

…e Mammoth regression

Fix crash in VGMSeq Load issue #34

This issue has been caused because VGMSeq::readMode has never been initialized. VGMTrans goes into GetHeaderInfo with `readMode = READMODE_CONVERT_TO_MIDI` and `midi = NULL`. Therefore, a null pointer reference has occurred, when VGMTrans tries to set PPQN to MIDI object.