Added info about new specs added by BJ fulton to README file.

README.md

@@ -48,19 +48,23 @@ To use the code is simple:
 
    will download all the data from 2016-04-01 to the current day.
 
-3. Optional: you can also add the proposal IDs in command line. To fetch data from proposals 
-   MyProp-001 and MyProp-002, for example, you can do:
+3. **Optional**: you can also add the proposal IDs in command line using the `-proposalID` flag. 
+   To fetch data from proposals MyProp-001 and MyProp-002, for example, you can do:
 
        python download_data.py -sdate 2016-04-01 -proposalID "MyProp-001,MyProp-002"
 
    Note this will override the userdata.dat proposals, in order to preserve back-compatibility.
 
-4. Optional: you can also add the data folder in which the data will be stored. If you want to 
-   store the data of proposal MyProp-001 in "/home/myuser/myLCOGTdata", just do:
+4. **Optional**: you can also add the data folder in which the data will be stored with the `-datafolder` 
+   flag. If you want to store the data of proposal MyProp-001 in "/home/myuser/myLCOGTdata", just do:
 
        python download_data.py -sdate 2016-04-01 -proposalID "MyProp-001" --datafolder "/home/myuser/myLCOGTdata"
 
    Note this will override the datafolder in userdata.dat, in order to preserve back-compatibility.
 
+5. **Optional** (addition by BJ Fulton): you can use a flat directory structure instead of sorting into date 
+   subdirectories using the `-flatdir` flag. Also, if you only want to download NRES spectral packages, 
+   use the `-spectra` flag.
+
 Note that the code checks if a given frame is already downloaded. If it is on the system, then 
 the frame is not downloaded.