Fixes 319 - MySQL 5.6 compatibility

Removed the default field during migrations for text fields
Added "required" option on incident message

app/database/migrations/2015_01_05_201444_CreateComponentsTable.php

@@ -16,9 +16,9 @@ class CreateComponentsTable extends Migration
         Schema::create('components', function (Blueprint $table) {
             $table->increments('id');
             $table->string('name');
-            $table->text('description')->default('');
-            $table->text('link')->default('');
-            $table->text('tags')->default('');
+            $table->text('description');
+            $table->text('link');
+            $table->text('tags');
             $table->integer('status');
             $table->integer('order');
             $table->integer('group_id');

app/database/migrations/2015_01_05_202609_CreateIncidentsTable.php

@@ -18,7 +18,7 @@ class CreateIncidentsTable extends Migration
             $table->integer('component_id')->default(0);
             $table->string('name');
             $table->integer('status');
-            $table->longText('message')->default('');
+            $table->longText('message');
             $table->integer('user_id');
             $table->timestamps();
             $table->softDeletes();

app/database/migrations/2015_01_05_202826_CreateMetricsTable.php

@@ -17,7 +17,7 @@ class CreateMetricsTable extends Migration
             $table->increments('id');
             $table->string('name');
             $table->string('suffix');
-            $table->text('description')->default('');
+            $table->text('description');
             $table->boolean('display_chart')->default(1);
             $table->timestamps();