Update README.md

Updated readme with potreeconverter build instructions

README.md

@@ -38,14 +38,42 @@ See the [API documentation page](/docs/index.adoc).
 
 ### Run it Natively
 
-If you are already running [OpenDroneMap](https://github.com/OpenDroneMap/OpenDroneMap) on Ubuntu natively, you can simply type:
+If you are already running [OpenDroneMap](https://github.com/OpenDroneMap/OpenDroneMap) on Ubuntu natively you can follow these steps:
 
+1. Install PotreeConverter and LASzip dependency
+ 
+```bash
+apt-get install -y libboost-dev libboost-program-options-dev
+
+mkdir /staging
+git clone https://github.com/pierotofy/LAStools /staging/LAStools
+cd LAStools/LASzip
+mkdir build
+cd build
+cmake -DCMAKE_BUILD_TYPE=Release ..
+make && make install
+ldconfig
+
+git clone https://github.com/pierotofy/PotreeConverter /staging/PotreeConverter
+cd /staging/PotreeConverter
+mkdir build
+cd build
+cmake -DCMAKE_BUILD_TYPE=Release -DLASZIP_INCLUDE_DIRS=/staging/LAStools/LASzip/dll -DLASZIP_LIBRARY=/staging/LAStools/LASzip/build/src/liblaszip.so ..
+make && make install
 ```
+2. Install gdal2tiles.py script, node.js and npm dependencies
+
+```bash
 sudo curl --silent --location https://deb.nodesource.com/setup_6.x | sudo bash -
 sudo apt-get install -y nodejs python-gdal
 git clone https://github.com/pierotofy/node-OpenDroneMap
 cd node-OpenDroneMap
 npm install
+```
+
+3. Start node-OpenDroneMap
+
+```bash
 node index.js
 ```