refs#16

In ElementaryUtils:
- Added string split function by string delimiter in StringUtils.

In PARTONS:
- Changed ObservableKinematic to use GenericType instead of fromStringToDouble.
- Some fix in DVCSConstantModel.

In PARTONs_Tests:
- Force C++98 in CMakeLists.

include/ElementaryUtils/string_utils/StringUtils.h

@@ -108,6 +108,9 @@ public:
     static std::vector<std::string> split(const std::string &chaine,
             char splitCharacter);
 
+    static std::vector<std::string> split(const std::string &chaine,
+            const std::string & splitSymbols);
+
     /*!
      * \fn static std::string vectorToString( std::vector<std::string> vector )
      * \brief Transforme un vector de string en une chaine de caracteres

src/ElementaryUtils/string_utils/StringUtils.cpp

@@ -258,6 +258,25 @@ std::vector<std::string> StringUtils::split(const std::string &chaine,
     return strings;
 }
 
+std::vector<std::string> StringUtils::split(const std::string &chaine,
+        const std::string & splitSymbols) {
+    std::vector<std::string> strings;
+    int index = 0;
+    int size = splitSymbols.size();
+
+    for (unsigned int pos = 0; pos < chaine.size(); ++pos) {
+        if (chaine.substr(pos, size) == splitSymbols) {
+
+            strings.push_back(chaine.substr(index, pos - index));
+            pos += (size - 1);
+            index = pos + 1;
+        }
+    }
+    strings.push_back(chaine.substr(index, chaine.size() - index));
+
+    return strings;
+}
+
 std::string StringUtils::vectorToString(std::vector<std::string>* vector) {
     std::string res = EMPTY;