Add pokememes info, convert it to new format and drop unnecessary database tables

This commit introduces pokememes information storage in source code (because they're rarely changed and I always update them manually).

All information about pokememes updated after nerf of 25 April. Also, added buttons to /pokedeks command for changing pages (there are 21 pages already!), and limited one page to 35 pokememes.

lib/dbmapping/levels.go

@@ -1,16 +0,0 @@
-// i2_bot – Instinct PokememBro Bot
-// Copyright (c) 2017 Vladimir "fat0troll" Hodakov
-
-package dbmapping
-
-import (
-	"time"
-)
-
-// Level is a struct, which represents `levels` table item in databse.
-type Level struct {
-	ID        int       `db:"id"`
-	MaxExp    int       `db:"max_exp"`
-	MaxEgg    int       `db:"max_egg"`
-	CreatedAt time.Time `db:"created_at"`
-}

lib/dbmapping/pokememes.go

@@ -1,34 +0,0 @@
-// i2_bot – Instinct PokememBro Bot
-// Copyright (c) 2017 Vladimir "fat0troll" Hodakov
-
-package dbmapping
-
-import (
-	"source.wtfteam.pro/i2_bot/i2_bot/lib/datamapping"
-	"time"
-)
-
-// Pokememe is a struct, which represents `pokememes` table item in databse.
-type Pokememe struct {
-	ID           int       `db:"id"`
-	Grade        int       `db:"grade"`
-	Name         string    `db:"name"`
-	Description  string    `db:"description"`
-	Attack       int       `db:"attack"`
-	HP           int       `db:"hp"`
-	MP           int       `db:"mp"`
-	Defence      int       `db:"defence"`
-	Price        int       `db:"price"`
-	Purchaseable bool      `db:"purchaseable"`
-	ImageURL     string    `db:"image_url"`
-	PlayerID     int       `db:"player_id"`
-	IsActive     int       `db:"is_active"`
-	CreatedAt    time.Time `db:"created_at"`
-}
-
-// PokememeFull is a struct for handling pokememe with all informations about locations and elements
-type PokememeFull struct {
-	Pokememe  Pokememe
-	Locations []datamapping.Location
-	Elements  []datamapping.Element
-}