ges-clip: when a child, is removed, disconnect from its notifies.
ges: Disable the Pitivi formatter

It lacks to many feature and the code is too bad, desactivation until
someone comes and fix it... The code should be removed if it never
happens
timeline: No autotrans between elements in same toplevel container

This makes no sense, we ended up creating/removing tons of transition
while moving groups
launch: Make it easier to render project

Now providing an output uri is enough to tell that you want to render.

It will use project rendering infos when possible, missing a way to
specify which info if various are disponnible (we use the first one
right now).

+ Make options more logical now, -l mean --load, and -r means repeat
launch: Simplify encoding profile description

Use a 'simple' synthax to describe encoding profiles
video-transition: Keep switch transition type simple

Also make sure there is a proper default value for transition type.
xml-formatter: set LC_NUMERIC locale before saving values.

Avoiding to save ',' instead of '.' for floats in certain locals
docs: add proxy editing design
tests: add proxy editing test
project: add proxy editing
project: some fixes
project: add pause proxy creation
docs: add progress API in proxy editing design
docs: add uri API in proxy editing design
project: add API for get proxy state
project: fix pause proxy creation
docs: small fix in proxy edition design
project: add API for setting user location in proxy editing
docs: added allow-none annotation
project: create proxies one by one