improving documentation

Changelog.textile

+h2. Version 0.2.0
+
+* Fixing bugs on release shared memory
+* Fixing bug on receive POST with empty message
+* Adding a different location to get channels statistics *push_stream_channels_statistics*
+* Adding new directives "push_stream_max_number_of_channels":#push_stream_max_number_of_channels, "push_stream_max_number_of_broadcast_channels":#push_stream_max_number_of_broadcast_channels and "push_stream_memory_cleanup_timeout":#push_stream_memory_cleanup_timeout
+* Removed support to PUT and DELETE http methods on publisher location
+* Removed different types of return on publishing messages in case that was published on a empty channel or on one which has subscribers
+* Removed directive push_stream_subscriber_disconnect_interval, this interval is calculate based on push_stream_subscriber_connection_timeout
+* Change default values of some directives
+
+(head). | directive | old value | new value |
+|"push_stream_min_message_buffer_timeout":#push_stream_min_message_buffer_timeout|7200 seconds|_unset_|
+|"push_stream_max_message_buffer_length":#push_stream_max_message_buffer_length|10|_unset_|
+|"push_stream_authorized_channels_only":#push_stream_authorized_channels_only|on|off|
+|"push_stream_store_messages":#push_stream_store_messages|on|off|
+|"push_stream_max_channel_id_length":#push_stream_max_channel_id_length|1024 bytes|_unset_|
+|"push_stream_broadcast_channel_max_qtd":#push_stream_broadcast_channel_max_qtd|1|_unset_|
+
+h2. Version 0.1.0
+
+Initial version of this module was based on "pushmodule":http://pushmodule.slact.net