Release v10.1.29

• removed bad code and made compatible with pip 10 (#13805)
• [Fix] Tax not changes when user change the POS profile in the sales invoice
• Patient medical record updation and deletion fixes (#13891)
• fix taxable amount for same items (#13927)
• cint for Item field has_variants (#13916)
• [fix] Update show_in_website in template
• [fix] consider user permissions in leave application calendar view (#13902)
• Set Qty in transactions based on serial no via Stock Settings (#13897)
• dark magic to revive travis