Set RELEASE and OS_NAME correctly when lsb_release is unavailable

Author: BanzaiMan

.travis.yml

@@ -24,8 +24,8 @@ install:
 
   before_script:
     - 'export INSTALL_DEST=${INSTALL_DEST:-/opt/python}'
-    - 'export LSB_RELEASE=${LSB_RELEASE:-$(lsb_release -rs || echo ${$(sw_vers -productVersion)%*.*})}'
-    - 'export OS_NAME=${OS_NAME:-$(lsb_release -is | tr "A-Z" "a-z" || "osx")}'
+    - export LSB_RELEASE=$(lsb_release -rs 2>/dev/null || sw_vers -productVersion | sed 's/^\([0-9][0-9]*.[0-9][0-9]*\).*/\1/')'
+    - 'export OS_NAME=${OS_NAME:-$((lsb_release -is || echo "osx") | tr "A-Z" "a-z")}'
     - 'export ARCH=${ARCH:-$(uname -m)}'
     - 'export PACKAGES=${PACKAGES:-pip numpy nose pytest mock wheel}'