Update README.md
Tag search failures as warnings
fix eigen2 building bug rept by Roland Hieber
We cannot target 10.5 while building on Mountain lion due to a compiler/sdk incompatibility. This should fix the build error by selecting 10.6 as a build target. Fixes #335
Build 32-bit binaries only in deployment mode
Better OX version check
Merge branch 'master' into issue116