adding transportability and impact

updated the proposal strategies to include comments from all three webinars.

removed the summary section since it needs to be submitted separately (though I'm not sure how we need to handle section numbering with this change). This will also apply to the Data Management Plan and some additional sections we haven't added yet. 

added more impact and transportability material. More may be required - I'm not sure how we are on length. If I switch this to the proposalnsf style it's only starting onto page 7.