Merge pull request #96 from VarunAgw/notifications

Add support for e-mail notifications when new replies are processed.
Updated plupload to newer version and finished frontend part
Using WP time constants to denote time period
Refactored `if` condition
Using WP media uploader to add attachments rather accessing plupload directly
Removed check for events_registered as it is not required
Corrected phpmailer SMTPSecure parameter
Merge pull request #91 from VarunAgw/email-handling

Add support for uploading files and attaching them to threads.
Removed unrequired JSON API's

JSON API will be included by default in WordPress 4.1
Checking presence of ['respondents'] before using it
Removed a todo comment as feature is already implemented
Not accessing arrays directly returned from a function
Removed nonce and cap check todo from action_save_post

nonce verifications is done by WordPress
capability check is done by SupportFlow()->extend->permissions->limit_user_permissions()
Removed capability check todo comment as it is already done
Merge pull request #101 from VarunAgw/comment-removal

Removed a todo comment as feature is already implemented
Merge pull request #102 from VarunAgw/php-backward-compatibility

Not accessing arrays directly returned from a function
Merge pull request #107 from VarunAgw/nonce-capability-check

Remove invalid @todos
Typecasting to boolean rather using boolval()

Currently it uses boolbal() which was not present in PHP 5.3
Checkbox were unselected after deleting an account
Open SupportFlow menu when viewing 'Edit Predefined reply' page

Currently if you visit "Edit Predefined reply" page, the SupportFlow menu
in sidebar get closed