Attempt to fix build on cygwin or without pkg-config
More windows fixes for slashes and spaces
Merge remote-tracking branch 'github/gui'
Rename entity -> party and object -> asset globally
media build: even more hacky robustness
New Range[Interval] type and corresponding SQL "segment"

These will be useful for better defining clips/excerpts but are not used yet.
schema: Stick to $ references for SQL functions
Double double precision why does sql need to have its own names for everything
Fix SQL syntax (mine is awful lately)