Make the eigen C files part of the common sources

fixed some numerical issues in 3x3 eigensolve

  Making the 2x2 and 3x3 Eigen stuff more consistent.

for symmetric 2x2 eigensolve

removing mac-specific line endings

  Factored out common part of Diderot_World_t struct (see Diderot/world.h) and
  fixed output routines for the C and Parallel targets.

  Deal with the different sizes of status flags statically, instead of dynamically.

Update includes a working version of the OpenCL backend and output support. Upated the output function args to include a size_t output argument for the output data. 

  Another indexing fix

  Fix vector indexing syntax for gcc.

  Port eigen code to Diderot runtime

  Add calls to stabilize method to sequential and parallel runtimes

  Switched parallel runtime to use Diderot_Output and Diderot_Print.  Also fixed a bug
  in nrrd output code.

  Split output code into two functions: one for nrrd files and one for text files.

Moved output proceedure to seperate file and updated c-target to use new output.

  More runtime system name changes

  Switch to using checked allocation function; added cuWidth info to OpenCL target.

Added Support for converting host strands to its shadow types 

  minor formatting changes

Nrrd output.  Use with the -nrrd command line option.

  Working on stabilize support

  minor tweaks to runtime

Removed buildinfo log from runtime and fixed strand init on GPU side 

  Added name to world structure in OpenCL runtime.  Also added more error
  checking to Diderot_LoadSource.

  Use the program name as the default output file name.

  Added timing support and fixed a build typo

  Adding support for command-line arguments

  Working on command-line option support

  Working on parallel runtime

  Port eignevalue stuff to diderot runtime

  Working on porting eigenvector code to Diderot runtime conventions

  Working on multiple-target support

  Runtime system updates to support Die and to eliminate race for stabilizing

  Fix syntax error

  Some runtime system changes

  Working on new runtime build infrastructure