adds let statement
fixes #54
closes #81
make a space optional in # template

Fixes #38, Closes #82
fix: support html entities in templates

Fixes #32
Closes #80
documents and reorganizes the compiler code

Closes #83
fix issue on log display

Closes #84
Fixes #87 Copy paste fail

Closes #91
fix: require rt only once in a compiled template

Fixes #85