added security service latch
added doc and tfa field
move latch to providers
update latch features
Added GREE
alphabetize
Added GREE logo and docs

Also changed twofactorauth.org docs links to be HTTPS.
Salesforce supports 2fa
Merge pull request #796 from ffr4nz/master

added provider Latch
Merge branch 'jdavis_master' into salesforce
Put Salesforce in the right alphabetical order
Add Webroot to security.yml
adding new logo file for new provider
rigt sized file#
Adding crypto photo after correction

Right size file.
Update providers.yml
changed the name to cryptophoto.png:
Delete crypto.png
Delete cryptophoto.png
renamed the cryptophoto