Improvements of disable/enablehyphenation

Now it continues to work even if you load a different language. Ex:

\selectlanguage{langx}

some hyphenated text with langx settings

\disablehyphenation

some non-hyphenated text with langx settings

\selectlanguage{langy}

some non-hyphenated text with langy settings

\enablehyphenation

some hyphenated text with langy settings
Documenting hyphenation enabling/disabling
Fixed spurious spaces in gloss-russian.ldf
Support for Austrian variant of German
Update gloss-lithuanian.ldf

\chaptername needs to start with a capital letter
Correction by Marcin Woliński.
Corrections by Marcin Woliński and Adam Twardoch.
Merge pull request #72 from gns-ank/patch-1

Update gloss-lithuanian.ldf
Merge pull request #70 from ivankokan/master

improvements for Croatian translations
Merge pull request #64 from jspitz/master

Support for Austrian variant of German
Merge pull request #61 from odomanov/master

Fixed spurious spaces in gloss-russian.ldf
Merge pull request #47 from eroux/master

Documentation and improvements of enable/disablehyphenation
Merge pull request #1 from reutenauer/master

Sync