v2.1.0

Begin to support GitHub Flavored Markdown. Start with:

• New: Table. |---:|:---:|:---| things. Thanks @RaffaeleMorganti .

Options via build script:

• New: Option to make the text background becoming transparent. So, you can build a theme using existing color scheme for different theme. Thanks @andrewhu-uw .
• New: Option to highlight HEX value, e.g. 0x123ABC. Not Markdown, only for eye candy. Thanks again @RaffaeleMorganti .

Minor:

• Improve: Add \~ \> \< highlighting.
• Improve: Syntax keyword is no longer case sensitive.