Add 2 templates

[Fluoflo]

No description provided.

[lexoyo]

hey @Fluoflo thank you !
I need you to do 2 things before I can accept the pull request:

• add a screenshot, with the same name and size (678x336) as the other templates, like this one - this is because the templates appear on silex website
• rename your index.html to editable.html and publish your website as explained here so that there is a "clean" index.html beside your editable.html (if this is too confusing, I guess you could skip this step)

[Fluoflo]

Committed screenshots and change idnex -> editable but I'm not sure where the "clean" indexes come from

[lexoyo]

You are supposed to open file > settings > publication settings, and select a folder as shown here
silexlabs/Silex#238

Select your root folder, where your editable.html is

[Fluoflo]

Ok, got it. PR squashed & ready to merge!