Update README.md

Merge pull request #98 from cossou/allow-string-parameters

Allow string parameters

Merge pull request #95 from virgiliopontes/patch-1

JSON driver issue with username.

Updated MySQL/Postgre connector version

Merge pull request #80 from cossou/pr/79

Pr/79

Merge pull request #70 from ArtisanTinkerer/master

Added .' 2>&1' to the exec command.

Changed execute() function.

Wrong validation on the `$run_as_user` strlen
Wrong su command -u option

Update README.md

New optional parameters to the database connection

Added optional parameters ´db_sid´ and ´jdbc_dir´.

Merge pull request #24 from cossou/development

New version 2.0