various improvements and additions:

- changed all public properties to private properties
- added getter/setter for site property
- modified the constructor to be more robust
- added check for existance of curl module
- added method/function set_wlansettings_base() which uses REST and is now leveraged by several other methods/functions
- added method/function set_wlan_mac_filter()

README.md

@@ -95,8 +95,11 @@ This class currently supports the following functions/methods to get/set data th
 - stat_sysinfo()
 - stat_voucher()
 
-Internal functions:
+Internal functions, getters/setters:
 - set_debug()
+- set_site()
+- get_site()
+- get_cookie() (renamed from getcookie())
 - get_last_results_raw()
 - get_last_error_message()
 
@@ -153,7 +156,5 @@ Please refer to the `examples` directory for some more detailed examples which y
 >
 >Here `jl3z2shm` is the value required for $site_id.
 
-Have a look at the files in the `examples` directory for more examples how to use this class.
-
 ## Important Disclaimer
 Many of these functions are not officially supported by UBNT and as such, may not be supported in future versions of the UniFi controller API.