[ADD][hr_loan] Add first commit of module hr_loan
[REF][hr_loan] Add editable bottom
[IMP] super in compute_sheet for load share of loan
[IMP] total_loan in hr.payslip
[IMP] fixed compute salary after compute share
[ADD] data for loan operations
[IMP] tree view of loan
[FIX] fix in algorithm fortnight
[IMP] PEP8 and validations
[IMP] readonly in Shares and company_id field in Loan
[ADD] Security to the module
[IMP] company_id field and currency_id related field added in hr.loan.lines
[IMP] subtotal_footer added in view
[IMP] loan name in name of loan line
[ADD] share of loan in payslip.lines
[IMP] pep8
[IMP] pylint
[ADD] validations of context and ids in methods
[ADD] validation, to eliminate one loan with paid shares not allowed
[FIX] load view before security