examples: python: unbreak example

After Statsd -> StatsdClient renaming example is borken.
examples: python: unbreak StatsdClient.send()

send() is defined as staticmethod, so it' does not have self. Fixing
this also requires all other methods convertion to non-static which is
logical assuming the should all use self.addr set by __init__().
examples: python: remove local_settings.py overrides

It's rather strange to override parameters passed to __init__ via custom
settings file.
examples: python: host and port are not used
examples: python: print exceptio to stderr
examples: python: do not catch BaseExceptions
examples: python: more useful errors
examples: python: StatsdClient.send() returns outcome

It's useful but unused.
examples: python: simplifications
examples: python: use isinstance() to suport inheritance
exmaples: python: unbreak doctests
examples: python: whitespacing
examples: python: move frequently used imports to the top
Use counter_rates in graphite backent
skip setting intermediate variable
Merge pull request #205 from SaveTheRbtz/master

Unbreak python example
Merge pull request #208 from draco2003/remove_valuesPerSecond

skip setting intermediate variable
Merge pull request #207 from draco2003/use_counter_rates

Use counter_rates in graphite backent
Fixing global leaks
Another global leak