Merge pull request #113 from mporrato/wip

Fix config files path for staged installations
enable libnice debug messages when debug_level >= 7
Fix for the recent ICE issues with Firefox stable
Potentially missing mutex unlock when parsing candidate
Merge pull request #116 from ploxiln/nice_debug

enable libnice debug messages when debug_level >= 7
Configuration and API to enable/disable libnice debugging
echotest page start button needs autocomplete off for button to be re-enabled on reload in firefox

strange but true
http://stackoverflow.com/questions/5985839/bug-with-firefox-disabled-attribute-of-input-not-resetting-when-refreshing
Merge pull request #119 from ploxiln/echotest_button_ff

echotest: fix Start button being disabled after stopping
Fixed demo pages as per #119
Further fixes on inputs in demo pages as per #119
fix accidental copy of videocalltest.html, apply intended changes to original

related to further changes for #119
Merge pull request #120 from ploxiln/fix_file_copy_120

videocalltest.html fixup
Install header files