Merge pull request #1 from mhenry07/bugfix/remove-csv-gem

Remove csv from Gemfile
Merge pull request #2 from mhenry07/feature/update-readme

Update README.md
Merge pull request #3 from mhenry07/feature/wkhtmltopdf-windows

Add notes and configuration for wkhtmltopdf on Windows
Update README.md

Split setup and usage, to distinguish between steps you would take every time you use the script, and steps you only need to take the first time.
Update README.md

Missing line break fixed.
Create pdfoptions.txt
Added note about PDF options from wkhtmltopdf
Updated toggl-freshbooks to delete existing time entries for the date being imported, so we don't have duplicate entries.
Merge branch 'master' of github.com:eimajenthat/toggl-invoice
Removed extra puts call in delete function.