Merge branch 'pugixml'

This replaces the old ezxml XML parser with a newer, more robust XML
parser pugixml. This fixes several nagging issues:
    * Memory leaks caused by ezxml's string handling
    * Some unreasonable XML syntax constraints (e.g. tags of the same
      type must be together -- in ezxml not following this caused a segfault)

The MIT-licensed pugixl parser (pugixml.org) is checked-in under libpugixml/
it has no modifications and so should be easily upgrade-able.

Some common code was moved into libvtrutil/ which contains generally useful
and re-usable code for use across VTR.

Some useful utilities for working with pugixml are included in libvtrutil:

    * In the pugiutil:: namespace - utilities for performing error
      checks when accessing XML data (e.g. error if tag does not exist)

    * In the pugiloc:: namespace - utilities for getting line numbers
      from xml elements (used for error reporting)

Conflicts:
	libarchfpga/read_xml_arch_file.c
	vpr/SRC/base/OptionTokens.h
	vpr/SRC/base/ReadOptions.c
	vpr/SRC/base/ReadOptions.h

Author: kmurray

ODIN_II/Makefile

@@ -20,11 +20,11 @@ ABC_INC = -I $(ABC_DIR)/src/bdd/cudd -I $(ABC_DIR)/src/bdd/epd -I $(ABC_DIR)/src
 # Use this value of OPT_FLAGS to simulate in parallel (requires GCC >= 4.2)
 #OPT_FLAGS = -O2 -fopenmp 
 
-INC_FLAGS =  -I../libarchfpga/include -I../libcommon_c++/SRC/TIO_InputOutputHandlers $(ABC_INC)
+INC_FLAGS =  -I../libarchfpga/include -I../libpugixml/src -I../libvtrutil/src -I../libcommon_c++/SRC/TIO_InputOutputHandlers $(ABC_INC)
 LIB = -L../libarchfpga -larchfpga -lm -ldl
 C_DIRECTIVE = -DVPR6 -DUSING_BISON
 
-FLAGS = $(DEBUG_FLAGS) $(WARN_FLAGS) $(OPT_FLAGS) $(INC_FLAGS)
+FLAGS = $(DEBUG_FLAGS) $(WARN_FLAGS) $(OPT_FLAGS) $(INC_FLAGS) -std=c++0x
 C_FLAGS = $(C_DIRECTIVE)
 
 YFILES = $(SRC_DIR)/verilog_bison.y

ODIN_II/README.txt

@@ -12,10 +12,6 @@ Odin will link the libarchfpga library located in:
 By default Odin II uses libarchfpga_6. To compile it, change directory to 
 ../libarchfpga_6 and type "make". 
 
-Note: 
-- for WIN32 compilation you'll have to edit the ezxml.c files
-to "#define WIN32" or not.
-
 2. Odin II
 
 Odin is compiled with a standard Makefile.  For the first time