Close #1
Merge branch 'enhacement-#1' into develop
Add app requirements
Update app requirements
Remove temporal file
Add attribute and element parser options
Parse indicators and observations collections
Modify README
Update parser name in order to avoid collision
Integrate Herminio's model mapping.
Update requirements.txt to include Flask
Updated model mapping
Update parser
Merge branch 'enhancement-#3' into develop
Update gitignore
Add new XML example
Update gitignore
Delete own model in order to use Landportal-model
Add parser for Dataset, Datasource and License
Update project structure based on Landportal-data-access-api. Closes #4