Log Message:
Update wkhtmltopdf to 0.12.2.1.

v0.12.2.1 (2015-01-19)

- update OpenSSL to 1.0.1l
- #2084: [qt] make background transparent by default when rendering to PDF
- #2142: fix wkhtmltoimage ignoring --javascript-delay and --window-status
- #2151: [qt] fix PDFs rendering without embedded fonts on 64-bit Cocoa build

v0.12.2 (2015-01-09)

- external libraries updated: OpenSSL to 1.0.1k, libpng to 1.5.21 and
  xz to 5.2.0
- fix build failure with unpatched Qt >= 5.3
- #1539: [qt] using OpenType fonts now results in selectable text on Windows
- #1638: [qt] fix incorrect rendering of JPEG images on Windows Server
  2008 x64
- #1639: block access to local files on Windows when an invalid URL is used
- #1640: [qt] make table page-break logic opt-in via CSS at the row level
- #1676: do not allow overriding the header/footer settings for cover pages
- #1676: set page margins correctly via computed header/footer heights
  for multiple URLs
- #1758: fix corrupt image when output is specified as "-" in wkhtmltoimage
  on Windows
- #1722: [qt] fix broken hyphenation with soft-hyphens
- #1769: fixed unicode URLs in links
- #1772: added variable 'isodate' for substitution in headers/footers
- #1790: fix handling of temporary files during PDF conversion via API
- #1808: fix [sitepage] and [sitepages] not working without
  HTML headers/footers
- #1825: fix handling of non-ASCII characters in command-line arguments
- #1863: [qt] blank page or crash with low DPI on Windows
- #1892: --window-status causes endless loop with --header-html
- #1906: fix wrong comparison when parsing list parameters
- #1944: [breaking change] fix the reflection subsystem to fix
  the non-functional API
- #1949: fix generation of tarball in the posix-local build
- #1955: installer does not work on 32-bit OS X (10.6.x or 10.7.x)
- #1961: add explicit dependency on minimal font packages for all
  linux targets
- #1988: fix footer spacing being ignored (and header spacing being used
  instead)
- #1992: add support for CentOS 7 target
- #2055: [qt] rendering of Thai symbols is very slow