Merge pull request #44 from clarencecastillo/master

Updated database_report_world() function in dose.py and added 'blood' key in organism's status dictionary
Version 0 in activate_ragaraja() from "all currently tested instructions" to "User-defined set of instructions to be used". Original version 0 (all currently tested instructions) is set as version 99.
ignore everything in examples/Simulations
1. Added "ragaraja_instructions" into simulation parameters. 2. Set to use user-defined Ragaraja instructions set (version 0) if required. 3. Log "ragaraja_instructions" into database.parameters table
update functions' documentations
Merge pull request #5 from mauriceling/master

1. Added "ragaraja_instructions" as simulation parameters. 2. Enabled users to define a set of Ragaraja instructions to be used. 3. Written function documentations for database loggers