Remove unused dependency bjsonrpc
Remove dependency on unused augeas

We can introduce it later again when it actually being used.
Use json instead of simplejson library to avoid extra depedency

Simplejson is an externally mainainted version of json library available in
Python 2.6 and up. It supports Python 2.5 which were are not targetting.
It also boasts better speed which is not at all a factor for us.
Remove wrong dependency on libpython2.7

python2.7 is what we should depend on. libpython2.7-stdlib a dependency
for python2.7 contains all the standard libraries. libpython2.7, I believe, is 
required only for using python modules written in C.
Remove hard coded list of timezones in favor system time zones

- Setting the system to a timezone that does not exist in system is bad
- The timezone list will get outdated frequently
- Duplicating a large list that already maintained elsewhere
Merge pull request #79 from SunilMohanAdapa/misc-cleanup

Misc cleanup