Support for bison 2.7 and flex 2.535
Merge branch 'master' of https://github.com/dreal/drio

Conflicts:
	src/shell/CMakeLists.txt
Support for bison 2.7. Flex 2.5.35
+Dependencies fix
temp commit
Changed memory management
feat(src): Memory management
chore: remove "*~", add the rule to .gitignore
fix(CMakeLists.txt): clean up bison/flex related deps

close #1
feat(shell): use 'include "shell/*"' instead of 'include "*"'
checkpoint
fix(CMakeLists.txt): CMAKE_CXX_FLAGS

In general, we should not use "-Wno" options. Most of the time, they are
actually indicating problem in code:

 - move "Wno-deprecated-register" to src/shell/CMakeLists.txt file so
   that it will be only applied to the files under shell directory. This
   one comes from bison/flex which we do not have control.

 - remove "-Wno-delete-no-virtual-dtor". I think we can change the code
   not to generate the warnings.
checkpoint2