* 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
Functions must be annotated as `stateful` in order to
- Update the contract state (using `put`)
- Call `Chain.spend` or other primitive functions that cost tokens
- Call an Oracle or AENS function that requires a signature
- Make a remote call with a non-zero value
- Construct a lambda calling a stateful function
It does not need to be stateful to
- Read the contract state
- Call another contract with value=0, even when the remote function is stateful
