Enable Python bindings in vte formula.
Fix trailing whitespace.
vte formula now does not assume location of pygobject-codegen-2.0
Addressed review comments
Addressed review comments
Improve comment
Python dependency is not recommended
Only "--enable-python" if `build.with? "python"`
Moved some code into `if build.with? "python"`
vte: add 0.28.0 bottle.