updated readme.md
updated readme.md
updated readme.md
Updates `readme.md` for secure db library;

*   Adds introduction
*   Improves formatting
*   Corrects file names
updated readme.md
updated readme.md
updated readme.md
updated readme.md
removed time/randomness dependency from session library
Merge pull request #40 from rash805115/master

Minor changes in readme.md and some libraries
Merge pull request #39 from abhshkdz/db-library-readme

Updates `readme.md` for secure db library
modified test files to use config to set DB
Merge pull request #41 from rash805115/master

modified test files to use config to set DB
dependency in core libraries
Merge pull request #42 from rash805115/master

dependency in core libraries
MAIL support added to log library
Merge pull request #43 from rash805115/master

MAIL support added to log library
extra options added in mail
Merge pull request #44 from rash805115/master

extra options added in mail
corrected bug found by minhaz