* Bundle, Rename: Add some comments
FreeList, RenameTable: Comment out unused variables

* refcnt: Implement AdderTree for reference counter

* build.sc: add testOne method for unit test

* AdderTest: add testbench for Adder (passed)

* AdderTree: Add testbench for AdderTree (passed)

* ReferenceCounter: implement a 2-bit counter

* Rename: remove redundant code

* Rename: prepared for move elimination [WIP]

* Roq: add eliminated move bit in roq entry;
  label elim move inst as writebacked
AlternativeFreeList: new impl for int free list
Rename: change io of free list
Dispatch1: (todo) not send move to intDq
Bundle: add eliminatedMove bit in roqCommitInfo, uop and debugio
ReferenceCounter: add debug print msg

* Dispatch1: [BUG FIX] not send move inst to IntDq

* DecodeUnit: [BUG FIX] differentiate li from mv

* Bug fix:
  1. Dispatch1: should not label pdest of move as busy in busy table
  2. Rename: use psrc0 to index bit vec isMax
  3. AlternativeFreeList: fix maxVec calculation logic and ref counter
     increment logic
Besides, more debug info and assertions were added.

* AlternativeFreeList Bug Fix:
  1. add redirect input - shouldn't allocate reg when redirect is
     valid
  2. handle duplicate preg in roqCommits in int free list

* AlternativeFreeList: Fix value assignment race condition

* Rename: Fix value assignment race condition too

* RenameTable: refactor spec/arch table write process

* Roq: Fix debug_exuData of move(addi) instruction
  (it was trash data before because move needn't enter exu)

* Rename: change intFreeList's redirect process
  (by setting headPtr back) and flush process

* ME: microbench & coremark & linux-hello passed
  1. DecodeUnit: treat `mv x,x` inst as non-move
  2. AlternativeFreeList: handle duplicate walk req correctly
  3. Roq: fix debug_exuData bug (make sure writeback that updates
debug_exuData happens before ME instruction in program order)

* AlternativeFreeList: License added
build.sc: remove unused config
Others: comments added

* package rename: remove unused modules

* Roq: Replace debug_prf with a cleaner fix method

* Disp1/AltFL/Rename: del unnecessary white spaces

* build.sc: change stack size
AlternativeFreeList: turn off assertions

* build.sc: change stack size for test