XORT Compiler xortcode

[xort] Fixed: memory leaks in xvm and compiler, handling escape sequences handling, updated run time tests.

[xort] Fixed bug in removing redundant stk frames. Added method item() to list iterator.

[xort] bug fixing.

[xort] frames enter/leave disbalance initial fix

[xort] pack/unpack instruction support initial. Some optimization for xvm speed.

[xort] native object support - almost finished

[xort] native objects support

[xort] peep-hole optimization implemented. load.c.s2 1, convert.s2u2 -> load.c.u2 1;

[xort] buggy implementation of peep-hole implementation. Fix needed

[xort] continue with fixing and optimising.