DB: source formatting, readme and general cleanup

- Fixed version comments in both .sql files.
- Source formatting in .sql files (using tabs now)
- Added readme with simple and quick install instructions.
- v3.sql -> oracle.sql
- dump_tab_data -> export_oracle_to_postgres.pl (fixed reference to table_order)
- poradiTabulek -> table_order
DB: source formatting, updated readme

- Added some comments and source formatting for export script.
- Updated readme file.
DB: fixed readme
Updated main readme file, added readme for services

- Updated content of main README.md.
- Added basic readme file for perun-services.
DB: support for passing parameters to export scripts

- Added support for parameter passing for export scripts
- Added export_oracle_to_oracle.pl
- Added table_order_base file for creating an user-empty DB instance
- Updated readme
Merge pull request #403 from zlamalp/cleanup

DB: cleanup of DB related files and scripts, updated readmes