Merge pull request #1 from sgillies/master

Slicing and manual updates
Merge pull request #3 from sgillies/master

For 1.2.14
Merge pull request #7 from sgillies/master

Work on a Debian bug
Merge pull request #9 from sgillies/master

Another fix from Debian
Revert "use Cython to build speedups if it is installed"

This reverts commit 9e6b452467b0b3fbe1f548940aebe4cbde34db05.
applied sean's cythonizing patch
removed cython imports
print warning if cython failed (e.g. command not found)
Merge branch 'master' into HEAD
Merge pull request #11 from sgillies/master

Fix for bug reported by tomkralidis
Merge branch 'master' of /Users/seang/code/gispy-lab/src/Shapely-1.2
Merge branch 'master' of git@github.com:Toblerity/Shapely
Merge branch 'master' of /Users/seang/code/gispy-lab/src/Shapely-1.2
Merge branch 'master' of /Users/seang/code/gispy-lab/src/Shapely-1.2
Added unary_union() function.
add failing test that accesses child geometry of a deleted collection
set parent of collection childs to prevent seg faults
Merge pull request #18 from WeatherGod/unary_union

Added unary_union() function.
Merge pull request #19 from olt/fix-collection-segfault

Fix collection segfault
Add proxy for GEOS C API 1.7.0 with unary union method.

Follows up on pull request by Benjamin Root.