Renamed the ic reading file in preparation for merge with output file writing.

Former-commit-id: f17c0b3035232a97db951f6aaba2cac41c9a6cf0

src/Makefile.am

@@ -31,9 +31,9 @@ AM_LDFLAGS = $(LAPACK_LIBS) $(BLAS_LIBS) $(HDF5_LDFLAGS) -version-info 0:0:0
 
 # Build the libswiftsim library
 lib_LTLIBRARIES = libswiftsim.la
-libswiftsim_la_SOURCES = space.c runner.c queue.c task.c cell.c engine.c ic.c timers.c
+libswiftsim_la_SOURCES = space.c runner.c queue.c task.c cell.c engine.c input.c timers.c
 
 # List required headers
 include_HEADERS = space.h runner.h queue.h task.h lock.h cell.h part.h const.h \
-    engine.h swift.h ic.h timers.h
+    engine.h swift.h io.h timers.h
 

src/swift.h

@@ -33,4 +33,4 @@
 #include "runner.h"
 #include "runner_iact.h"
 #include "engine.h"
-#include "ic.h"
+#include "io.h"