dynamically-modify tools/tiff2pdf.c so as to keep uptodate with upstream changes
Merge branch 'develop' into rm_tiff2pdf_c
add a .gitignore file
make targets build,test require target deps;  slight logging improvement
attempt to limit map growth (to 5000 currently);  capture latest warning/error albeit in a single-threaded way
try to improve error capturing
Merge branch 'autogen_tiff2pdf_c' into develop

Conflicts:
	t2p-test/main.go
	tiff2pdf/tiff2pdf.go
Merge branch 'develop' of github.com:companieshouse/go-tiff2pdf into develop

Conflicts:
	t2p-test/main.go