Character count added and tests passing.

Remove sql restriction for count to not be null.

migrations/versions/0002_add_content_char_count.py

@@ -0,0 +1,27 @@
+"""empty message
+
+Revision ID: 0002_add_content_char_count
+Revises: 0001_restart_migrations
+Create Date: 2016-04-15 12:12:46.383782
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0002_add_content_char_count'
+down_revision = '0001_restart_migrations'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.sql import table, column
+
+
+def upgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('notifications', sa.Column('content_char_count', sa.Integer(), nullable=True))
+    ### end Alembic commands ###
+
+
+def downgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('notifications', 'content_char_count')
+    ### end Alembic commands ###