M2bk

+ Each file will be inside its own bucket key (s3_bucket+name)
+ For each mongodump, a random UUID is appended to the
output directory in order to avoid name collisions
+ One config to rule them all: one config file can handle several
hosts and their databases
+ Option: Dry run mode -> doesn't do a thing (--dry-run or -d)
+ Option: Log to stdout (-s or --stdout)
+ Option: set log level (--ll or --log-level)
+ 'log' module is now using 'logging' module
* app.init_cmdline is now using argparse instead of the old optparse
* FIX: config._list_merge: dest dict was not being checked out before insertion

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* Colored stdout
* The argument -s/--stdout has been swapped by -q/--quiet which specifies the opposite, this means that m2bk will print on stdout by default
* Introducing drivers: backups are transferred via drivers in order for m2bk to have more flexibility
* s3 module reimplemented as a driver
* dummy driver introduced
* log module does not use syslog anymore, instead it handles its own log file (no /dev/log required anymore).
Log file can be specified via the parameter -l | --log-file
* [s3 driver] Option aws_id renamed to aws_access_key_id
* [s3 driver] Option aws_access_key renamed to aws_secret_access_key

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* [hotfix] README.rst was not included in the distribution package

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* New module 'fs' handles file-related operations
* An UNIX signal handler has been implemented
* [config] mongodb.output_dir has been migrated to fs.output_dir
* [config] configuration file format has been changed from JSON to YAML
* [config] New option mongodb.hosts.*.auth_db for specifying authentication database per host
* ISO8601 format is used for naming temporary directories
* [config] Removed 'debug' directive

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* The project is now distributed under the MIT License
* Project renamed to: m2bk

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* Output directories have their UUID at the end of their names