More silent executions

* Silently continue execution of commands regardless of errors
  which are prone to happen with Vim's customizability.
* Remove ctrlp#msg() as it's no longer needed.

Fix #95 and prevent similar issues.

autoload/ctrlp.vim

@@ -1110,11 +1110,7 @@ endf
 
 fu! ctrlp#setdir(path, ...)
 	let cmd = exists('a:1') ? a:1 : 'lc!'
-	try
-		exe cmd.' '.ctrlp#fnesc(a:path)
-	cat
-		cal ctrlp#msg("Can't change working directory.")
-	endt
+	sil! exe cmd.' '.ctrlp#fnesc(a:path)
 endf
 " Highlighting {{{2
 fu! s:syntax()
@@ -1345,25 +1341,17 @@ fu! s:migemo(str)
 	retu str
 endf
 
-fu! ctrlp#msg(msg)
-	redr | echoh Identifier | echon "CtrlP: ".a:msg | echoh None
-endf
-
 fu! s:openfile(cmd, filpath, ...)
 	let cmd = a:cmd =~ '^[eb]$' && &modified ? 'hid '.a:cmd : a:cmd
 	let cmd = cmd =~ '^tab' ? tabpagenr('$').cmd : cmd
 	let tail = a:0 ? a:1 : s:tail()
-	try
-		exe cmd.tail.' '.ctrlp#fnesc(a:filpath)
-	cat
-	fina
+	sil! exe cmd.tail.' '.ctrlp#fnesc(a:filpath)
 	if !empty(tail)
 		sil! norm! zvzz
 	en
 	if exists('*haslocaldir')
 		cal ctrlp#setdir(getcwd(), haslocaldir() ? 'lc!' : 'cd!')
 	en
-	endt
 endf
 
 fu! s:writecache(read_cache, cache_file)

autoload/ctrlp/buffertag.vim

@@ -165,9 +165,6 @@ fu! s:esctagscmd(bin, args, ...)
 		let last = s:enc != &enc ? s:enc : !empty($LANG) ? $LANG : &enc
 		let cmd = iconv(cmd, &enc, last)
 	en
-	if empty(cmd)
-		cal ctrlp#msg("Encoding conversion failed!")
-	en
 	retu cmd
 endf
 

autoload/ctrlp/quickfix.vim

@@ -43,13 +43,8 @@ fu! ctrlp#quickfix#accept(mode, str)
 	let cmd = md == 't' ? 'tabe' : md == 'h' ? 'new' : md == 'v' ? 'vne'
 		\ : ctrlp#normcmd('e')
 	let cmd = cmd == 'e' && &modified ? 'hid e' : cmd
-	try
-		exe cmd.' '.ctrlp#fnesc(filpath)
-	cat
-		cal ctrlp#msg("Invalid command or argument.")
-	fina
+	sil! exe cmd.' '.ctrlp#fnesc(filpath)
 	cal cursor(items[2], items[3]) | sil! norm! zvzz
-	endt
 endf
 
 fu! ctrlp#quickfix#id()

autoload/ctrlp/tag.vim

@@ -90,19 +90,15 @@ fu! ctrlp#tag#accept(mode, str)
 		\ }
 	let cmd = fnd[0] == 1 ? cmds[md][0] : cmds[md][1]
 	let cmd = cmd == 'tj' && &modified ? 'hid '.cmd : cmd
-	try
 	let cmd = cmd =~ '^tab' ? tabpagenr('$').cmd : cmd
 	if fnd[0] == 1
 		if cmd != ''
-				exe cmd
+			sil! exe cmd
 		en
-			exe fnd[1].'ta' tg
+		sil! exe fnd[1].'ta' tg
 	el
-			exe cmd.' '.tg
+		sil! exe cmd.' '.tg
 	en
-	cat
-		cal ctrlp#msg("Tag not found.")
-	endt
 endf
 
 fu! ctrlp#tag#id()