Merge pull request #1 from Melvinivitch/master

Add two questions pertaining to US court-cases
Update README.md
Rename mastering_digital_currency_usage.txt to digital_currency_usage.txt
Add note regarding intended audience
Add note about total question pool size
Reword alt-coin conf time Q for better precision
Add five questions
Add 3 questions
Merge pull request #4 from Melvinivitch/patch-3

Add five questions
Merge pull request #3 from Melvinivitch/patch-2

Reword alt-coin conf time Q for better precision
Add 5 questions
Add 5 questions
Update with Qs re early digital-cash researchers
Replace Q1, and add 5 questions
Rename practical_and_monetary_implications.txt to properties_and_monetary_implications.txt
Update README.md
Add note about issue creation
Fix merge conflict