Bencher update (#507)

* update weight template

* ignore resources consumed by benched submethods

* * refactor bencher / no need for build script
* add wasm_builder for building benches into wasm
* colorized output

* update docs

* remove cfg(test)

* clippy

* clippy

* wasm handle panic

* generate bench tests

* update docs

* fix features

* update the way benches are defined

* fix reset reduntant meter

* fix repeat-reads/writes

* cleanup