typos in strings

Here's a list of typos and similar errors I noticed while updating the Inkscape translation for 0.91.

Messages 8-11 could use a translator comment (New what?, None of what?, All of what?). That helps clarify the gender and person for the translated string without having to look it up in the source code.

1)
can be use with
can be used with

2)
to reduse rapid
to reduce rapid

Done: 3)
Done: seperately
Done: separately

4)
This function modifies path so it will be able to be cut with the rectangular cutter.
This function modifies path so it will be possibe to cut it with a rectangular cutter.

5)
cuters
cutters

Done: 6)
Done: Please modify 'Start X' or 'End X'
Done: Please modify 'Start X value' or 'End X value'

Done: 7)
Done: y-interval cannot be zero. Please modify 'Y top' or 'Y bottom'
Done: y-interval cannot be zero. Please modify 'Y value of rectangle's top' or 'Y value of rectangle's bottom'

8)
Preview's paint emmit (pts/s):

9)
../src/ui/dialog/document-properties.cpp:843
New

10)
../src/ui/dialog/filter-effects-dialog.cpp:549 ../share/extensions/grid_polar.inx.h:4
None

11)
../src/ui/dialog/find.cpp:74
All