Fix to_python() when strings are indented by stripping whitespace before evaluating.

[doc] fix typos

Issue #117: Fix bug with finding comment node

Unsynchronized tree: __repr__ recursion fix for #119, #121

Conflicts:
	.gitignore

# Conflicts:
#	redbaron/base_nodes.py

# Conflicts:
#	redbaron/base_nodes.py

Fix append call breaks help

refs #120

Fix the links to the documentation

Added `find_iter` method, which is became base for `find` and
`find_all` methods.

# Conflicts:
#	redbaron/base_nodes.py
#	tests/test_at.py