fix: Project: do not log and use the directory

There is not much use in storing the directory, because it is normally
the current directory.
Without the directory the logs are portable, i.e., they can be moved to
different locations along with their containing directory and a project
can be started there.

plugin/vim-bob.vim

@@ -229,12 +229,7 @@ function! s:ParseProjectArgs(args)
 			endif
 			let g:bob_prefix = l:match[1]
 			" parse directory
-			let l:line = getline(l:line_nr + 3)
-			let l:match = matchlist(l:line, '    directory: \(.*\)')
-			if empty(l:match)
-				throw 'internal error: expected entry `directory` at line ' . (l:line_nr + 3)
-			endif
-			call s:Init(match[1])
+			call s:Init(expand("%:p:h"))
 			" parse configuration
 			let l:line = getline(l:line_nr + 2)
 			let l:match = matchlist(l:line, '    configuration: \(.*\)')
@@ -284,7 +279,6 @@ function! s:Project(bang, ...)
 	let l:log_string = ["- " . l:package . ":",
 				\"    prefix: " . g:bob_prefix,
 				\"    configuration: " . l:args_config,
-				\"    directory: " . s:bob_base_path,
 				\"    arguments: [" . l:args_args . "]",
 				\"    date: \"" . strftime('%FT%H:%M:%S') . "\"",
 				\"    command: " . l:project_command]