double-barrelled filename support (but not HCP files :( )

Bf/filetree

See merge request fsl/fslpy!203

This is now the new default behaviour when loading a new file

This change is not backwards compatible!

against >=2.8.2.

Rf/protect nifti header

See merge request fsl/fslpy!200

Image.save was resulting in a Nifti without a header.

DOC: changelog [skip ci]

See merge request fsl/fslpy!198

REF: rewrote the parsing of the templates

See merge request fsl/fslpy!197

I think these tests would have failed before refactoring

There were some subtle bugs in the use of get_all, which should now be fixed. They were caused by having multiple optional variables and the result not being deterministic if these were iterated in different orders.

Mnt/release

See merge request fsl/fslpy!195

Bf/bids

See merge request fsl/fslpy!194

Rf/mghimage torig

See merge request fsl/fslpy!192

sure the MGHImage class preserves this.

TEST: wx.GetApp() called through platform.haveGui) is returning an

See merge request fsl/fslpy!190

old App object, and causing test to fail.