Converted WMATA from iOS6.x to iOS7.0 and Reorganized WMATAsystem

-Added Credits to Self-Written Pages

in WMATA System:
-Reorganized the Search and Sort commands by reducing the individual
methods for each array to only one of each by using the super class.
Because each of the array of different types inherit from the abstract
class Transit, which has both properties of code and name already.
-Reduced the dependency on the doneLoading() boolean function which
returns whether the count of the # of successful fetches is sufficient
by creating a boolean function for each major fetch. Now it can be
determined which data structure is not successful and a huge initial
load will not be necessary.
-Reorganized the Constructor. In particular, one constructor exists for
each tab (fav, route, stops, incidents). The no parameter init now
simply initiates the boolean loading variables.
-Protected the code by introducing try{} and catch{} to each major fetch
-more modular code