Merge pull request #158 from stevenweaver/v3

V3
Merge pull request #159 from stevenweaver/v3

HYP-301: Adjusting formula for lower and upper bounds
Merge branch 'v3' of https://github.com/stevenweaver/hyphy into v3
Changed the implementation of bounds a bit; most importantly transposed the grammar definition of LOWER [:>] and UPPER [:<] bounds; removed the code that was left over from handling += etc, not relevant for bound operations
Implementse for loops, continue and break statements.
Fixing segfault caused by the unhandled _HY_OPERATION_DEFERRED_FUNCTION_CALL case in _Formula::internalToStr()
Fixing segfault caused by the unhandled _HY_OPERATION_DEFERRED_FUNCTION_CALL case in _Formula::internalToStr()
Merge pull request #160 from spond/v3

HYP-301,303,306
Removing dangling else and logical-op-paranthesis warnings for all OSX versions. Removing unused _all_binary_ops declaration in parser.cpp