Fixed typo on --enable-comm, removed all references to --enable-precision except for config options, where it is listed as deprecated. Removed travis test for single precision.

.travis.yml

@@ -9,11 +9,6 @@ matrix:
     - os:        osx
       osx_image: xcode8.3
       compiler: clang
-      env: PREC=single
-    - os:        osx
-      osx_image: xcode8.3
-      compiler: clang
-      env: PREC=double
       
 before_install:
     - export GRIDDIR=`pwd`
@@ -55,7 +50,7 @@ script:
     - make -j4
     - make install
     - cd $CWD/build
-    - ../configure --enable-precision=$PREC --enable-simd=SSE4 --enable-comms=none --with-lime=$CWD/build/lime/install ${EXTRACONF}
+    - ../configure --enable-simd=SSE4 --enable-comms=none --with-lime=$CWD/build/lime/install ${EXTRACONF}
     - make -j4 
     - ./benchmarks/Benchmark_dwf --threads 1 --debug-signals
     - make check