Added line profiling and coverage support.

Author: CnlPepper

.coveragerc

@@ -0,0 +1,4 @@
+[run]
+plugins = Cython.Coverage
+source = raysect
+omit = *tests*

setup.py

@@ -8,6 +8,7 @@
 use_cython = True
 force = False
 profile = False
+line_profile = False
 
 if "--skip-cython" in sys.argv:
     use_cython = False
@@ -21,6 +22,10 @@
     profile = True
     del sys.argv[sys.argv.index("--profile")]
 
+if "--line-profile" in sys.argv:
+    line_profile = True
+    del sys.argv[sys.argv.index("--line-profile")]
+
 source_paths = ['raysect', 'demos']
 compilation_includes = [".", numpy.get_include()]
 compilation_args = []
@@ -30,6 +35,11 @@
 }
 setup_path = path.dirname(path.abspath(__file__))
 
+if line_profile:
+    compilation_args.append("-DCYTHON_TRACE=1")
+    compilation_args.append("-DCYTHON_TRACE_NOGIL=1")
+    cython_directives["linetrace"] = True
+
 if use_cython:
 
     from Cython.Build import cythonize