3-13-19 hydroshare integration, data logger file preprocessing

Major feature additions:

1. data logger file validation (preprocessing): from the process data logger files from a 'Validate data' button was added. After you first enter the row number for the column headers and the data start row you can validate the data. This will read through the file, find the start and end dates for the data in the file and compare it to values in the data base. notifications will appear indicating if there is overlap between the file and the database or if only new records are present in the file.
2. Hydroshare integration reworked: a command line interface (CLI) function been built for uploading specified files as Hydroshare resources. The command for building an SQLite database from a dataset has been reworked. The dataset from, where you can submit datasets for upload to Hydroshare now writes a shell script which should be initiated by checking for changes to the file with incrontab (https://www.howtoforge.com/tutorial/trigger-commands-on-file-or-directory-changes-with-incron/).

Bug fixes:

1. Fix for mapping sampling features: sometimes people don't complete the sites or specimen table for sampling features of those types. This update prevents an error if that is the case.
2. Fix an error for map popups when time series have no time series result values.