[Flow-v1.3] API change and improved scripts

Created by: acrovato

Context

This PR brings the latest changes in Flow to master. This version is the minimal requested to run CUPyDO-v1.0

Modifications

• Split Solver class into Newton and Picard classes, user can choose the algorithm as they see fit
• Improved polar scripts, the solver and the problem are not re-initialized at every change in angle of attack
• Created template functions in python calling the C++ classes and functions used in the tests, if the C++ code changes, then there is only one python file to adapt
• Added CODEOWNERS file
• Minor cleaning/refactoring
• Minor refactoring by @rboman

Tests

Tests are passing on debian-4.9 (gaston), ubuntu-16.04 (shippable, no Trilinos) and ubuntu-18.04 (my VM)

Comments

• Regarding the template functions I created for flow tests and validation (flow/template.py): I am not sure about this new method, I will probably refactor it into real python API in the future
• Regarding the CODEOWNERS file: this is a test, I will try to PR without adding any reviewers

fwk/wutils.py

@@ -80,11 +80,17 @@ def findbins(modname, dirB=['build','wavesB'], verb=False): # changer wavesB en
 	# check the paths one by one
     for p in libpath:
         if os.path.isdir(p):
+            if verb:
+                print "[findbins] adding %s to sys.path" % p
             sys.path.append(p)
+            if verb:
+                print "[findbins] sys.path =", sys.path
             break
     else:
         raise Exception("[findbins] '%s' not found!" % libpath)
 
+    #exec("import %s" % modwrap)
+    #mod = sys.modules[modwrap]
     mod = __import__(modwrap)
     print '[findbins] loading ', mod.__file__