Updated mydb

With one more column to handle url for every drug.
Updated choosen_drug.xml

Changed textsize.
Updated details.xml

Changed layout.
Updated drugs.xml

Changed layout.
Updated ChoosenDrugActivity

Added an string for url to find every drugs leaflet to be shown as a
link in the textview info.
Updated DBAdapter

Added another column url to be used in choosendrugactivity.