1. Add ale.setup and ale.setup.buffer for pure Lua configuration.
2. Update many global settings to use Booleans instead of numbers to
make types easiert to work with in Lua.
3. Radically reformat documentation and fix errors to make
documentation more usable for Neovim users.
* Add yosys for verilog files.
* Add handler test for yosys.
* fix typo in yosys handler test
* fix array order in yosys handler test
* add yosys linter to filetype defaults test
* fix duplicate tag
* add 'yosys' to 'ale-supported-languages-and-tools.txt'
* Added hdl_checker support
* Added hdl_checker tests
HDL Checker searches for files when no config file is found, which could lead to very long searches when the user is not really on a project setting
* Adds an option to pass additional arguments to the verilog/verilator linter
The new otion is g:ale_verilog_verilator_options
+ doc
* Spell check verilog linter doc file
* Add entries to the verilog linters in the doc table of content
* Vader test for verilog/verilator linter args option verilog_verilator_options
