resolve https://rt.cpan.org/Ticket/Display.html?id=7948
- i_writegif_low() wasn't setting the returned global palette, which
meant a rubbish palette was returned to the user (detected with valgrind)
+- built 0.43_02 for testing
0.43_03
but one step at a time)
- added bmp_compression_name, bmp_used_colors, bmp_filesize, bmp_bit_count
tags on reading a BMP file
+- added tools/imager to the distribution. This is still very
+ experimental and untested. Patches welcome, if you write tests to go
+ with them.
+- the BMP reader now validates the bfOffBits value from the BMP header
+ and skips to that offset before reading image data. Previously this
+ value was read but otherwise ignored.
+- added --palette action to tools/imager
+- i_img_pal_new() now releases the image object memory if creation
+ fails.
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