Fix Automatic Wrapper Generator Bugs

[kwabenantim]

Description

Fix various bugs in automatic wrapper generation:

• C++ 17 Compatibility cppwg#10
• Fix unable to find declarations cppwg#3
• Fix template parameters in method default args cppwg#5
• Fix handling of double pointers cppwg#6

[kwabenantim]

C++ 17 compatibility fixed by Chaste/cppwg#11

[kwabenantim]

"Unable to find declaration" errors fixed in Chaste/cppwg#38

[kwabenantim]

Chaste/cppwg#40 fixed "used without template arguments" errors from unhandled template parameters in method default arguments.