Add Apache license, and sanitize source headers

Project is "DMLocalization".

Update author date to date of class creation, a few years before it was
split out to the current structure.
Update build flag
Project settings updated by Xcode 5.1
Merge remote-tracking branch 'delicious-monster/master'
Don't parse value as format string is key contains no format specifiers

We have cases where English string contains "foo percent", and
localizations use "<foo>%", which used to fail format specifier
validation. If the key contains no specifiers, presumably we aren't
using it as a format string, so don't require the value to validate as
one.
Mark curly single and double quotes as equivalent to straight