Two corrections of "Atributes table"

line 83: In the :guilabel:`Atributes table` enable editing.  ----> `Atributes table` should be `Attribute table` for reasons of consistency (also 2 't"s)

line 101: In the guilabel:`Atributes table` for the  ----> guilabel:`Atributes table` missing colon and "t" as well as superfluous "s", should be :guilabel:`Attribute table` for reasons of consistency
fix for problem char, see https://github.com/qgis/QGIS-Documentation/issues/391
updates suggested by Junior Delaz
add templates for Processing algorithms help files
add TauDEM algorothms help
fix build errors
add Hypsometric curves documentation
add MetaSearch documentation
Merge pull request #390 from DiGro/patch-1

Two corrections of "Atributes table"
Merge pull request #389 from diethard2/master

removed documentation Open Streetmap
Merge pull request #392 from mewoch/jd

updates suggested by Junior Delaz
Merge pull request #393 from geopython/master

add MetaSearch documentation
added metasearch plugin to documentation and updated screenshots