Added list comprehensions and standard List, Option, Func, Pair, and Triple library (#105)

* Added standard List library and list comprehensions

Added List library.

Flatmaps WIP

Fixed dependency in flat_map

fcode generation

Updated tests to use custom list lib

Added comprehension test

Added stdlib

sanity

Test

* Extended stdlib for lists. Added error message for redefinition of stdlibx

* Fixed type template

* Improved stdlib

* More functions

* Fixed cyclic includes

* Refixed imports and added few tests

* Added fail test

* Undelete removed type spec

* Remove typo

* Fix iter function

* Fixed typo

* Added if guards and let statements in list comp

* Added more fail tests

* Option stliv

* 2 and 3 tuple stdlib

* Updated stdlib to new syntax. Added recursor and changed all/any functions

* Fixed performance issues. Changed include management

* Fixed hash type

test/contracts/voting.aes

@@ -36,7 +36,7 @@ contract Voting =
   function init(proposalNames: list(string)): state =
     { chairPerson = caller(),
       voters      = Map.empty,
-      proposals   = List.map((name) => {name = name, voteCount = 0}, proposalNames) }
+      proposals   = MyList.map((name) => {name = name, voteCount = 0}, proposalNames) }
 
   function initVoter() = { weight = 1, vote = NotVoted}
 
@@ -53,7 +53,7 @@ contract Voting =
       _            => delegate
 
   function addVote(candidate, weight) =
-    let proposal = List.nth(state.proposals, candidate)
+    let proposal = MyList.nth(state.proposals, candidate)
     proposal{ voteCount = proposal.voteCount + weight }
 
   function delegateVote(delegateTo: address, weight: uint) =
@@ -93,5 +93,5 @@ contract Voting =
 
   // const
   function currentTally() =
-    List.map((p) => (p.name, p.voteCount), state.proposals)
+    MyList.map((p) => (p.name, p.voteCount), state.proposals)