tinycodet 0.5.0

• Feature Improvement: help.import() now directly evaluates the arguments under help() if both arguments i and alias are missing.
• Feature Improvement: re_exports in import_as() can now include functions from core R if necessary, except 'base'.
• Performance Improvement: Replaced some of the internal code in the import system with 'C++' code via 'Rcpp' for some performance improvement.
• Bug fix: Fixed a (small) bug, where help.import() sometimes gave an unnecessary error, when searching topics of un-exported objects or non-functions via an alias object instead of searching functions directly.
• Bug fix: Fixed a (small) bug where class names were sometimes inconsistently assigned to functions and infix operators exposed by the 'tinycodet' import system.
• Removed Feature: Removed the form() function, as its use-case is a bit too rare to justify having a whole function for it (with all the tests and maintenance that come with it). I rarely remove functions; this is an exception.
• Fixed some mistakes in the documentation.
• Added more tests.
• help.import() can now also be called without any arguments, just like the original help() function.
• Moved the atomic type casting functions to the "DRY" category.
• Cleaned up the internal code of the import system a bit.
• Added the current year to the LICENSE file.