Update text strings for 2.4.2

Signed-off-by: Paul de Wouters <paul@hmn.md>
fix email address

Signed-off-by: Paul de Wouters <paul@hmn.md>
master is now 2.5 alpha
Merge branch 'master' of github.com:humanmade/backupwordpress
Bump the minimum requirements to WordPress 3.7.1
Remove back-compat time constants

These were added to core in 3.5, since we bumped the minimum requirements to 3.7.1 we can get rid of our back-compat versions.
Stop checking the minimum supported PHP version

WordPress 3.7.1 has a minimum requirement of PHP 5.2.4, no need for us to also check it.
Get rid of some stray double line-breaks
Stop testing against 3.6

Our new minimum requirement is 3.7.1
Bump the readme to require WordPress 3.7.1
Make the from email address filterable

By default backupwordpress send emails from the email address stored in the admin_email option.

The issues is some servers only allow sending emails from the current domain, in those cases the emails will fail to send.

Let's give those users a way to work around the issue by making the from email address filterable.
Merge pull request #441 from humanmade/update-lang-files-2.4.2

Update lang files 2.4.2
Merge pull request #434 from humanmade/filterable-from-email

Make the from email filterable
Made sure resize_options is defined inside catchResponseAndOfferToEmail
Merge pull request #442 from humanmade/minimum-3-7

Bump minimum required WordPress version to 3.7.1
Merge branch 'master' into feature/schedule-recurrence-settings

Signed-off-by: Paul de Wouters <paul@hmn.md>

Conflicts:
	backupwordpress.php
	readme.txt