Bump up MACOSX_DEPLOYMENT_TARGET to 10.7 for conda.

As of conda-build 2.0.0 the Anaconda packages are built with
MACOSX_DEPLOYMENT_TARGET=10.7.

Author: pavoljuhas

.travis.yml

@@ -109,7 +109,7 @@ install:
 
     # Mac OS X must use the same deployment target as conda-build.
   - if $MYUSEMC && [[ "${TRAVIS_OS_NAME}" == osx ]]; then
-        export MACOSX_DEPLOYMENT_TARGET=10.6;
+        export MACOSX_DEPLOYMENT_TARGET=10.7;
         export DYLD_FALLBACK_LIBRARY_PATH="${MYLIB}";
     fi
 

README.md

@@ -124,10 +124,10 @@ c++ testlib.cpp -I$P/include -L$P/lib -Wl,-rpath,$P/lib -ldiffpy
 ```
 
 On Mac OS X the libdiffpy package is built for OS X version
-10.6 which may be incompatible with codes emitted on newer OS.
-To fix this add `-mmacosx-version-min=10.6` option to the
+10.7 which may be incompatible with codes emitted on newer OS.
+To fix this add `-mmacosx-version-min=10.7` option to the
 c++ compiler or set it with an environment variable as
-`export MACOSX_DEPLOYMENT_TARGET=10.6`.
+`export MACOSX_DEPLOYMENT_TARGET=10.7`.
 
 
 ## DEVELOPMENT