Merge branch 'enclosure' into 'DEV'

Add CAD files

See merge request !8

Enclosure/README.md

+# EMIEI - Enclosure Designs  
+```
+Designs are open source and freely available. You can redistribute it and/or modify  it under the terms of the GNU General Public License as published by  the Free Software Foundation; either version 2 of the License, or  (at your option) any later version.  
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.  
+
+You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.  
+
+Contact: Callum.Inglis.2018(at)uni.strath.ac.uk  
+```
+<hr>
+## Sensor Enclosure
+Designed around a Wemos D1 Mini, with PMS5003 particle sensor, SHT & SEN-CCS811 Co2 sensor
+- [View on Autodesk360](https://a360.co/3gr0dd9)   
+- [Fusion 360 CAD File](Fusion_360/Sensor_Module.f3d)  
+- [STL - Top](stl/Sensor_Module_Lid.stl), [STL - Base](stl/Sensor_Module_Base.stl)  
+
+<hr>
+## Gateway LoRa Enclosure
+Designed to enclose the LoRa SX1278 V1.0 module with soldered antenna. 
+
+- [View on Autodesk360](https://a360.co/3GJaUTn)   
+- [Fusion 360 CAD File](Fusion_360/Gateway_LoRa_Enclosure.f3d)  
+- [STL - Top](stl/Gateway_LoRa_Enclosure_Top.stl), [STL - Base](stl/Gateway_LoRa_Enclosure_Base.stl)  
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