added modules to cabal file. renamed cabal fle
cabal base version constraint
added repository url to cabal file
still in work: stack-operations for push and pop for variables
added a symbol table and changed the variable operations to be local
fixed typo in push_into
Delete stack_variables.txt

fixed variables
added underflow_assert to pop_into
pleasing hlint
test script added option to run all tests in a directory
changed negative test cases to check only stderr on compiler errors
test script: implemented output to file
added beginning of junction performance test
added junction mode to performance script
fixed missing colon in test script
test script: also write test names to file
test script start implementing ast testing
Merge tag 'MS2'

Milestone 2 version

Conflicts:
	rail-compiler-editor.cabal
Merge branch 'master' into intertarget-code
#123: First attempt at defining a stack element struct.