change place of storing config files to ~/.ncmpcpp folder

doc/Makefile.am

@@ -1,3 +1,3 @@
 docdir = $(prefix)/share/doc/$(PACKAGE)
-doc_DATA = ncmpcpp_keys ncmpcpprc
+doc_DATA = config keys
 EXTRA_DIST = $(doc_DATA)

doc/config

@@ -1,7 +1,7 @@
-#################################################
-## this is example configuration file, copy it ##
-## to ~/.ncmpcpprc and set up your preferences ##
-#################################################
+####################################################
+## this is example configuration file, copy it to ##
+## ~/.ncmpcpp/config and set up your preferences  ##
+####################################################
 #
 ##### connection settings #####
 #

doc/keys

@@ -1,6 +1,6 @@
 #####################################################
 ## this is example key configuration file, copy it ##
-## to ~/.ncmpcpp_keys and set up your preferences  ##
+## to ~/.ncmpcpp/keys and set up your preferences  ##
 #####################################################
 ##
 ## Tips:
@@ -9,8 +9,7 @@
 ## - a command can be disabled by binding it to 0
 ##
 ## Note: First bind of volume_up/down
-## will be used to switch between columns
-## on media library screen.
+## will be used to switch between columns.
 ##
 #
 #key_up = 259 'k'