v0.10.0 alpha 1

• Added libbcs.bcs. Currently provides malloc/realloc/free, dynamic array and C-style printf functions.
• Added zcommon.acs, which simply imports zcommon.bcs.
• Nullable array/struct references can now be cast to/from int, allowing some rudimentary pointer arithmetic.
• "::" is now the namespace separator. [Positron, for BCC]
• Added "lengthof()" operator. [Positron, for BCC]
• Deprecated ".length()" array/string member functions. [Positron, for BCC]
• Deprecated "." as namespace separator. [Positron, for BCC]
• "lengthof()" can take in structure references now.
• Diagnostic messages are now written to stderr instead of stdout.