updated name of scikit-learn

Merge pull request #7 from atsju/patch-1

code review

Optimize distance computation for line clustering

added a simple testcase with a synth img

renamed function

vectorized computation of filter kernel

note about installing requirements before running example script

note about update

package, sorting algos for single and multi lines

refactored code, updated doc, allow word detector to work on both line and page level

added note about NN-based implementation

ignore pycharm dir

MIT LICENSE

init