Increased version to 1.0.7

Extend plugin in order to support saving image/video files in
custom folder.
- Android:
 By default image will be saved at "pictures" system folder,
 and video at "movies" system folder.If user set folder name it will be
at root external storage.
- iOS:
 By default image and video will be saved at photos.
 If user set folder name it will be added as new album at photos.


CWF-443

Increased version to 1.0.4

There is a fix for saving large videos.
Now we allocate a buffer with the size of 8 mb that we use for reading and writing files.
Also, now we are deleting video file from cache after save is completed.

CWF-377
CWF-360

Adding support for saving network resources.

CWF-359

gallery_saver was using the same request code for storage permission as image_picker for camera,
and it was crashing android app.

CWF-353

Instead of String, saveVideo/Image methods return boolean(true in a case of successful
operation and false in all others)

CWF-342

Fixed crash when requesting storage access on Android.

CWF-339

Added swift version and changed description.

CWF-338