Added shot name

added shot name in the shot table
corrected add shot form
notes:
a field shot_name varchar(255) needs to be added in table shots
I had to change name to shot_name, I think "name" was a function
somehow.
I also changed frame start, end and chunk form fields in shot_add
template : from placeholders to values ( as defaults, and so we dont
have to always type them during testing)