Version 1.4.15-cdb6

Upgrade mapnik sdk to 691-ga22b3e5

Version 1.4.15-cdb5

Upgrade mapnik sdk to 688-g9d40bb2

Version 1.4.15-cdb4

Upgrade mapnik sdk to 686-g71eca1f

Version 1.4.15-cdb3

TWKB filtering and simplifying operations harmonized

See CartoDB/mapnik#5

Version 1.4.15-cdb2

pgraster bugfixes:
 - rendering of single-band inputs as grey-scale did not correctly make nodata pixels transparent in the output
 - rendering of 16-bit single-band inputs displayed a wrap-around effect

twkb support:
 - see CartoDB/mapnik#2

New version

v1.4.15

v1.4.14

v1.4.13

v1.4.12