ctags fails if a template parameter list has an expression that uses << or >> in it

[focalintent]

Originally opened as arduino/arduino-builder#120

FastLED makes pretty extensive use of templates to do a lot of this work. Some of what's done with templates involves creating bitmasks from template parameters as parameters to other templates. Unfortunately, when the ctags parser sees "1<<X" as a template parameter, it eats itself.

This code demonstrates the problem:

template <int PORT_MASK> class controller { 

};

template <int LANES> class myClass { 
  public:
    void useController(controller<(1<<LANES)-1> & controller);    
};

void setup() { myctagstestfunc(); }
void myctagstestfunc() { }
void loop() {}

Because ctags stops parsing, the prototype for myctagstestfunc() is never created, and the dreaded 'myctagstestfun' was not declared in this scope error (as seen in #68)

[facchinm]

Fixed by merging #7