Merge pull request #3 from l0rb/master

make which and awhich accept less than 3 arguments
removed duplicated code from last commit
removed which-method since it can be simulated with buildingToplist
add flood limit to irc
fix commandline finding of players/alliances
improved information about player
implement getallianceinfo method
allow to type just !help
add whitespace in output for better readability
various api improvements
improved readme a bit
make lxml interchangable with elementtree

also use a requests session to reuse the connection
improved api a bit for db.py
add db.py which will build up a database for this universe
ad db functionality to irc
add db to readme
add example queries
add example queries, add command to list inactive players
fix last irc method
don't list inactive or vacation player