Ivlev Denis

``` datebased_prices = ( BasePrice.objects.instance_of(DateBasedPrice) .filter(car=car, DateBasedPrice___range__overlap=DateRange(range.lower.date(), range.upper.date())) .annotate(range_overlap=F('DateBasedPrice___range')) ) datetimebased_prices = ( BasePrice.objects.instance_of(DateTimeBasedPrice) .filter(car=car, DateTimeBasedPrice___range__overlap=range) .annotate(range_overlap=F('DateTimeBasedPrice___range')) ) prices = (datebased_prices | datetimebased_prices) ``` all times return **None** in _range_overlap_

[WIP] Feature/front vue

3

Rewrite front to vue Rewrite & optimize api For pr use [ivlevdenis/frontVue](https://github.com/ivlevdenis/dtp-stat/tree/feature/frontVue)

I'm testing cross compile this lib for Raspberry Pi 2. 1. Mount RPi rootfs to **/mnt/rasp-pi-rootfs/**. Create symlink in **/usr/local** to **/mnt/rasp-pi-rootfs/usr/local/QtDIR**. 2. Create simple test bin with `cargo new...