Changes in MM L1 Simulation

The following changes are implemented:

• Removed intermediate if-clause on hit vector size and moved up in the code, directly after hits being gathered from digits, replacing the check for empty size (alignment fixed accordingly in MMTriggerTool.cxx)
• Changed BC and age data types from double to int, as they should be
• Changed algorithm used to identify the smallest, positive BC (now done with std::minmax_element approach)
• Other minor changes in MMT_Diamond.cxx: used range-based for loop, passed object by reference and expanded tabs into space, fixing alignment

./cc @vadamico