Exception Handling and First Async Attempt

Export command Async, awaiting Csv parse Tasks.

Exception handling added to file selection, save file selection, csv
readers and csv writer.
Removed Packages from .gitnignore
Merge pull request #2 from Gusdor/master

 	Fixes problem opening solution file.
Async Export Command Completed
Initial busy indicator
Merge pull request #1 from Khendon/master

Merging in changes from Dave