[#3] Support MathJax in Javadoc
[#3] Support MathJax in Javadoc

Add javascript code for loading MathJax via CDN service in build.gradle
file. Javadoc option --allow-script-in-comments should be set to use
script tag in documents.

After this commit, using basic TeX commands is supported, by wrapping
equation by $ for inline equations or $$ for block equations like
$a^2 + b^2 = c^2$.
MyLittleFont/MyCurve