Parameter file

First version of parameter file parser. Should be able to:

• Read integers
• Read floats
• Read doubles
• Read strings
• Ignore comments that start with '#'
• Validate that integers are not written as floats in the input file
• Check whether two values are present on the same line
• Print the contents of the structure that holds all parameters read from the file

I had to add ../src/parser.c to the Makefile.am in the tests directory to get make check working. Not sure if this is the correct way of doing it.

src/Makefile.am

@@ -35,13 +35,13 @@ endif
 # 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 serial_io.h timers.h debug.h scheduler.h proxy.h parallel_io.h \
-    common_io.h single_io.h multipole.h map.h tools.h partition.h clocks.h
+    common_io.h single_io.h multipole.h map.h tools.h partition.h clocks.h parser.h
 
 # Common source files
 AM_SOURCES = space.c runner.c queue.c task.c cell.c engine.c \
     serial_io.c timers.c debug.c scheduler.c proxy.c parallel_io.c \
     units.c common_io.c single_io.c multipole.c version.c map.c \
-    kernel.c tools.c part.c partition.c clocks.c
+    kernel.c tools.c part.c partition.c clocks.c parser.c
 
 # Include files for distribution, not installation.
 nobase_noinst_HEADERS = approx_math.h atomic.h cycle.h error.h inline.h kernel.h vector.h \