Adds Leet convertor.

Will be used instead of UID in ctags.
Fixes typo.
Starts on CTagsCommandBuilder
Merges branch 'feature/add-ctags-ex-command' into develop
Fixes conflicting mapping.
Adds CTagsCommandBuilder and tests.

Refactored CTagsBuilder to use the command builder.
Adds custom regex patterns for matching WordPress hooks.
Adds new dependencies to container and fixes tests.
Merges branch 'feature/add-ctags-command-builder-class' into develop
Makes ConfigureTags command into :Wctags

With a bang, the ctags will be regenerated.
Improved tests for ConfigureTagsCommand
Merges branch 'feature/add-regenerate-ctags-with-bang' into develop
Enhances CommandRegistry.

* :CtrlPFoo commands now accept bang.
* The <bang> is forwarded to the target command in cmd_line
Fixes issue with forwarding commands from CtrlP
Adds WpHookCommand and tests.

* This is the base class for the :Waction and :Wfilter commands.
* get_ctag_kind is the abstract method to be provided by subclasses.
Adds WpActionCommand and tests.

* The `:Waction` command is the gateway to WordPress actions.
* Without bang => add_action
* With bang => do_action
Adds WpFilterCommand and tests.

* The `:Wfilter` command is the gateway to WordPress filter hooks.
* Without bang => add_filter
* With bang => apply_filters
Fixes listener regex pattern.
Adds WpActionCommand and WpFilterCommands to controller.
Merges branch 'feature/add-wp-actions-command' into develop
Wraps better error handling for missing subcommands

Should partially address #2