update split modal on the frontend to account for simpler transaction.
show splits in security and transaction right rails (where appropriate)
Merge branch 'master' into split_fix

Conflicts:
	ownership/js/directives.js
Merge branch 'master' into split_fix
prefer transaction security_type over cell security_type if possible for transaction attributes
make saveTransaction a bit more idiomatic
refactor for clarity and to simplify saveTransaction
simplify transForCell
get split deletions propogating to all cells appropriately, insertions still sometimes showing up where they should not
Merge branch 'master' into split_fix

Conflicts:
	ownership/js/services/captable.js
only show split transactions on splittable securities
clean up the split modal
fix null cell error on splits for what should be non-existant ledger_entries
Merge branch 'master' into split_fix
fix numUnissued to account for splits for history slider bug in #496
do not need to refresh securities related to removed ledger entries when adding / updating a split because it will be covered by new_entries
initial commit
Merge branch 'split_fix' into promisechain
remove some old tour code
bert is a genius