Implement [pdffile]_updates.plist in pdf parser

[libreliodev]

This is related to #140.

[AlirezaAlgo]

@libreliodev
This update plist file refers to existing annotations using their obj ID.
I reviewed WAPDFParser.m. Mainly CGPDF is used for accessing pdf document.

There's no method for accessing annotation object id with CGPDF.

• Maybe i didn't found the api yet.
• We should use another api for accessing obj ID.

Look an annotation example.

486 0 obj
<< /A 507 0 R /Border [ 0 0 0 ] /Type /Annot /Subtype /Link /Rect [ 85.3199
41.8132 574.255 438.555 ] >>
endobj
507 0 obj
<< /S /URI /URI (buy://localhost/wind_376/wind_376_.pdf) >>
endobj

[libreliodev]

There's no method for accessing annotation object id with CGPDF.

This seems to be exact: http://stackoverflow.com/questions/13861672/cgpdfobject-get-id

Let's think about it.

[libreliodev]

@serverfire I think the best way to solve this problem would be to use the annotation number on a given page, instead of object id. This would require some changes in libreliodev/javascript#128 . What do you think?

[AlirezaAlgo]

@libreliodev If you mean annotation index in a page by Annotation number.
We have to test it in javascript project too. Not all systems may have the same order.

[libreliodev]

@serverfire

We have to test it in javascript project too. Not all systems may not have the same order.

I agree.

[AlirezaAlgo]

@libreliodev Done with 324f514 & b9005d2

Tested with developer/wind/wind_384/wind_384.pdf.
And I've changed pdf-annotation-editor file. I'll commit changes shortly.

[libreliodev]

Successfully tested