Renamed 'Document' -> 'ObjectDocumentModel'
Updated links to other summarizers
Better package structure for tests
Typo
Edmundson: use significant words from text if possible
Added Python 2.6 compatibility for czech stemmer
Updated czech stop words
Luhn: added simple test with real text
Better test coverage
Typo 'summarizators' -> 'summarizers'
Changed title in README
Luhn: only words with TF > 1 are significant
Proper printing to Windows console
Expanded method 'is_stop_word' into inline code
Removed useless code
TF model: updated 'normalized_term_frequency'

Added parameter for smoothing term frequency.
TF model: test words as letters (not digits)
LSA: changed default smooth factor for TF 0.5 -> 0.4
LSA: added "real-world" summarization test
Tests: added function 'utils.load_resource'