Add initial Bring up Milestones markdown.
Add initial Bring up Milestones markdown.

This adds a place for us to keep milestones that will take a PR.
These milestones will be linked to out of the wiki for reference. For
additions open a github issue to start a conversation then PR an edit
that has the new milestone.  When milestones are acheived strike through the txt.

mmitche/llilc,manu-silicon/llilc,marksantos/llilc,AndyAyersMS/llilc,mmitche/llilc,BruceForstall/llilc,mmitche/llilc,JosephTremoulet/llilc,tempbottle/llilc,AndyAyersMS/llilc,JosephTremoulet/llilc,mmitche/llilc,dkorolev/llilc,adiaaida/llilc,swaroop-sridhar/llilc,marksantos/llilc,dkorolev/llilc,AndyAyersMS/llilc,pgavlin/llilc,russellhadley/llilc,manu-silicon/llilc,kyulee1/llilcjit,pgavlin/llilc,kyulee1/llilcjit,dotnet/llilc,manu-silicon/llilc,BruceForstall/llilc,kyulee1/llilcjit,swaroop-sridhar/llilc,richardlford/llilc,richardlford/llilc,russellhadley/llilc,BruceForstall/llilc,swaroop-sridhar/llilc,marksantos/llilc,dotnet/llilc,dkorolev/llilc,dotnet/llilc,richardlford/llilc,tempbottle/llilc,pgavlin/llilc,adiaaida/llilc,adiaaida/llilc,russellhadley/llilc,JosephTremoulet/llilc,tempbottle/llilc