add hint to trace()
had to update railo-context.ra after publishing pull #300
moved allowGzip to outer condition and set default header to empty-string

so that there's no need to handle null via StringUtil.isEmpty()
made function static to enable compiler optimization and moved

str.length() outside the loop to prevent unneeded method calls.
optimize extension provider call
add backward compatibility for Morpheus
Merge pull request #305 from igal-getrailo/improve-003

made function static to enable compiler optimization and moved
Merge pull request #303 from igal-getrailo/update-001

had to update railo-context.ra after publishing pull #300
Merge pull request #304 from igal-getrailo/cleanup-006

moved allowGzip to outer condition and set default header to empty-string
Merge pull request #302 from clitnak/4.1_traceCallerHint

add hint to trace()
Merge branch '4.1' of https://github.com/getrailo/railo into 4.1