Relocate firmware directory, etc.

1) With ASTNOW, an update to digium_phones module wipes out existing firmware, applications, and ringtones due to upgrade process removing the digium_phones subdirectory created by module.

2) With FreePBX, same set of files also could not be downloaded by phone because they exist in htpasswd protected path (admin).

Both these fixed by relocating digium_phones/firmware_package directory to html docroot.

3) Removed application_1.zip file (large) from module, was apparently a test file and not usable content.

4) Removed digium_phones_application_queues.php (from module root, not views), this was apparently a temporary duplicate and not being used.

5) Added missing file detection for applications and ringtones to silently remove associated mysql records.

6) Corrected path for deleting applications.