Always get properties and styles of elements as strings.
Always get properties and styles of elements as strings.

Before, we assumed that every element style or property was a string; now we
force it to be so. In the long term, a type safe library ought to be build on
top of this, but getting and setting arbitrary properties can't really be done
in a type safe manner.

This commit fixes issue 7.

crodjer/haste-compiler,akru/haste-compiler,nyson/haste-compiler,crodjer/haste-compiler,jtojnar/haste-compiler,beni55/haste-compiler,crodjer/haste-compiler,kranich/haste-compiler,joelburget/haste-compiler,nyson/haste-compiler,szatkus/haste-compiler,joelburget/haste-compiler,kranich/haste-compiler,santolucito/haste-compiler,jtojnar/haste-compiler,akru/haste-compiler,kranich/haste-compiler,akru/haste-compiler,szatkus/haste-compiler,santolucito/haste-compiler,nyson/haste-compiler,kranich/haste-compiler,crodjer/haste-compiler,jtojnar/haste-compiler,joelburget/haste-compiler,szatkus/haste-compiler,akru/haste-compiler,beni55/haste-compiler,beni55/haste-compiler,nyson/haste-compiler,beni55/haste-compiler,szatkus/haste-compiler,akru/haste-compiler,santolucito/haste-compiler,jtojnar/haste-compiler,crodjer/haste-compiler,joelburget/haste-compiler,santolucito/haste-compiler