Add missing __init__ and fix imports

.gitignore

@@ -3,4 +3,5 @@
 .ipynb_checkpoints
 .gitignore~
 *.swp
+*.egg-info
 ToDO.xlsx

RMTK.ipynb

@@ -2,7 +2,10 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "deletable": true,
+    "editable": true
+   },
    "source": [
     "<div class=\"clearfix\" style=\"padding: 10px; padding-left: 0px\">\n",
     "<a href=\"http://www.globalquakemodel.org/\"><img src=\"figures/gem-logo.png\" width=\"300px\" style=\"display: inline-block;\"></a>\n",
@@ -12,7 +15,10 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "deletable": true,
+    "editable": true
+   },
    "source": [
     "# Risk Modeller's Toolkit\n",
     "\n",
@@ -28,7 +34,9 @@
   {
    "cell_type": "markdown",
    "metadata": {
-    "collapsed": false
+    "collapsed": false,
+    "deletable": true,
+    "editable": true
    },
    "source": [
     "---\n",
@@ -64,7 +72,10 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "deletable": true,
+    "editable": true
+   },
    "source": [
     "---\n",
     "## Risk Module\n",
@@ -80,7 +91,10 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "deletable": true,
+    "editable": true
+   },
    "source": [
     "---\n",
     "## Vulnerability Module\n",
@@ -99,7 +113,10 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "deletable": true,
+    "editable": true
+   },
    "source": [
     "---\n",
     "<strong><span style=\"color:#444444\">The OpenQuake Risk Modeller's Toolkit (RMTK)</span></strong>\n",
@@ -131,7 +148,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython2",
-   "version": "2.7.10"
+   "version": "2.7.13"
   }
  },
  "nbformat": 4,