Named variables in Function expression (#390)

* - Tests are passing locally.
- MooseParser is a pointer in Function. Simplifies header include.
- Added wrapper.py which generates a derived class moose.A for each
  _moose.A. `moose.A` provides `connect` function. Instead of,
        moose.connect(a, 'f1', b, 'f2')
    One can do,
        a.connect('f1', b, 'f2')

* Developers emails are back in travis config file.

* If a symbol already exists, do not add it again. Fixed typo.

* If sympy not found, allow failure.  Added sympy on travis but not on OSX. Don't install sympy with python2.

* removed custom OrderedDict. Python2.6 is not needed to be supported.
Centos6 is EOL.

Author: dilawar

.ci/travis_build_linux.sh

@@ -21,6 +21,9 @@ $PYTHON2 -m pip install libNeuroML pyNeuroML python-libsbml --upgrade --user
 $PYTHON3 -m pip install pip --upgrade --user
 $PYTHON3 -m pip install libNeuroML pyNeuroML python-libsbml --upgrade --user
 
+# sympy is only needed for pretty-priting for one test.
+$PYTHON3 -m pip install sympy --upgrade --user   
+
 NPROC=$(nproc)
 MAKE="make -j$NPROC"
 

.travis.yml

@@ -11,13 +11,13 @@ matrix:
     osx_image: xcode11.3
 
 notifications:
-  email:
-    recipients:
-    - bhalla@ncbs.res.in
-    - dilawar.s.rajput@gmail.com
-    - hrani@ncbs.res.in
-    on_success: change
-    on_failure: always
+    email:
+        recipients:
+            - bhalla@ncbs.res.in
+            - dilawar.s.rajput@gmail.com
+            - hrani@ncbs.res.in
+        on_success: change
+        on_failure: always
 
 addons:
   apt:

CMakeLists.txt

@@ -110,7 +110,6 @@ add_executable(moose.bin basecode/main.cpp)
 
 
 ################################### SETUP BUILD ################################
-
 # default include paths.
 include_directories( ${CMAKE_CURRENT_SOURCE_DIR} )
 

basecode/FieldElement.h

@@ -90,8 +90,7 @@ class FieldElement: public Element
 		 *
 		 * Returns 0 if either index is out of range.
 		 */
-		char* data( unsigned int rawIndex,
-						unsigned int fieldIndex = 0 ) const;
+		char* data( unsigned int rawIndex, unsigned int fieldIndex = 0 ) const;
 
 		/**
 		 * virtual