- deleting unnecesary php files

- updating fontawesome fonts
- recover old version of solr.xslt

app/Models/Message.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace App;
+namespace App\Models;
 
 use Illuminate\Database\Eloquent\Model;
 

app/Shelf.php

@@ -1,17 +0,0 @@
-<?php
-namespace App;
-
-use Illuminate\Database\Eloquent\Model;
-
-class Shelf extends Model
-{
-
-    protected $fillable = [
-        'shelf'
-    ];
-
-    // public function books()
-    // {
-    // return $this->hasMany('App\Book');
-    // }
-}

app/Transaction.php

@@ -1,38 +0,0 @@
-<?php
-namespace App;
-
-use Illuminate\Database\Eloquent\Model;
-
-class Transaction extends Model
-{
-
-    protected $fillable = [
-        'student_id',
-        'book_id',
-        'borrowed_at',
-        'returned_at',
-        'fines',
-        'status'
-    ];
-
-    public function student()
-    {
-        return $this->belongsTo('App\Person', 'student_id');
-    }
-
-    public function book()
-    {
-        //model, foreign key in tsis model, primary key of relation
-        return $this->belongsTo('App\Book', 'book_id', 'id');
-    }
-
-    public function scopeNotReturnedYet($query)
-    {
-        return $query->where('status', 0);
-    }
-
-    public function scopeReturned($query)
-    {
-        return $query->where('status', 1);
-    }
-}