Backing out from rev 99 changes.

git-svn-id: svn://svn.code.sf.net/p/agg/svn/agg-2.4@102 ab9de31f-a152-4fe9-8809-95f286f9ca89
Fixed breakage from backing out from rev 99 changes.

git-svn-id: svn://svn.code.sf.net/p/agg/svn/agg-2.4@103 ab9de31f-a152-4fe9-8809-95f286f9ca89
Switched implementation of sRGB conversion from binary search to lookup table.

git-svn-id: svn://svn.code.sf.net/p/agg/svn/agg-2.4@104 ab9de31f-a152-4fe9-8809-95f286f9ca89
Fixed some build errors/warnings in Clang (patch from Mikael S. Persson, via Wojciech Mamrak).

git-svn-id: svn://svn.code.sf.net/p/agg/svn/agg-2.4@105 ab9de31f-a152-4fe9-8809-95f286f9ca89
Fixed error in "opacity" function (patch from Michael Droettboom).

git-svn-id: svn://svn.code.sf.net/p/agg/svn/agg-2.4@106 ab9de31f-a152-4fe9-8809-95f286f9ca89