Adding build script

compile.ssh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+echo "static const char * BUILD_TIMESTAMP=\"`date`\";" > build_timestamp.h
+
+em++ -Wall -Wextra -O3 -std=c++11 -s USE_SDL=2 ./main.cpp -o wave.js -I ./fftw-3.3.3/api ./lib/libfftw3f.a \
+    -s EXPORTED_FUNCTIONS='["_getText", "_getSampleRate", "_setText", "_getAverageRxTime_ms", "_setParameters",
+                            "_getFramesLeftToRecord", "_getFramesToRecord",
+                            "_getFramesLeftToAnalyze", "_getFramesToAnalyze", "_main"]' \
+    -s EXTRA_EXPORTED_RUNTIME_METHODS='["ccall", "cwrap", "writeArrayToMemory"]'