Release rst-2.0-pre.2

**`RST-2` Version 2.0 Pre-release 2**
**Changelogs (against `RST 2.0 Pre-1`):**
\+ Improve memory usage and performance when generating very large output
\+ Add launch script support for Unix systems and Windows
\+ Add application icons for GUI mode
\+ Add output to file option
\* String display formatting to differentiate "null" and null
\* Fix GUI load settings from command-line without range checks

Release rst-2.0-pre.1

**`RST-2` Version 2.0 Pre-release 1**
**Changelogs (against `RST-1`):**
\+ New types of `Randomiser`: `Base64Randomiser` and `WeightedRandomiser`
\+ Allow uses of `SecureRandom` instance
\+ New UI layout tested for `GNU/Linux (Gnome/Xfce)` and `Windows 10`
\+ Command-line argument support
\+ Command-line only working mode
\+ `Randomiser`, `RandomInputStream` and `SecureRandomInputStream` API for using RST as a library
\* Change implementation of the `AlphanumericRandomiser` (supersede `Randomizer` in `RST-1`)