Renamed Portfolio_Select to PortfolioSelect

Standard naming convention for java
Fixed file naming error

activity_portfolio__select to activity_portfolio_select
Changed file name

changed fragment_main_dummy.xml to list_fragment.xml
Fixed file naming error

Changed menu/portfolio__select.xml to portfolio_select.xml
Numerous readability changes

Changed filenames so they are indicative of actual contents
Made some static final variables that indicate different cases in switch
statements