tracing ability added into zrt test suite, zrt api extended by trace related feauture
efficient lazymount implemnetation, comments added for path_utils
support for _SC_AVPHYS_PAGES and tests added
bug fixed: open O_TRUNC,O_WRONLY,O_RDWR for dirs must be not allowed
tests fixed to be PASSED during tracing
fixed issue #131, nvram tests updated
issue #128, minor changes in tests, also added test for testing filesystem from constructor function
docs updated: info about gcov, trace was added
Merge pull request #133 from YaroslavLitvinov/test-fix

Test fix
aded tests related to issue #101, issue #128
fixed issue #132 tests added, issue #128
Merge pull request #134 from YaroslavLitvinov/dev

issues 132, 101
postmain zcall added; need to recompile glibc
fs export action moved from exit into postmain call
zrt api extended
alloc report implementation
clfags/ldflags to build with alloc report enabled
extending reserved channels list for alloc report
test suite extended with alloc reporting feature
added subtest for memory leaks testing