mdhelp: clean-up install_tvheadend.md and remove the to-do lines.. I …

…don't think we need to explain the differences between the package build types here as the AptRepository page on the wiki covers it..

docs/markdown/install_tvheadend.md

@@ -3,10 +3,8 @@
 This section tells you how to get hold of the software in the first place,
 and how to get it onto your system.
 
-###1. Install the Software
-
 Follow the instructions that are specific to your Linux distribution
-(Ubuntu/Debian/Mint, Arch, Fedora...). This will typically be PPA-and-dkpg
+(Ubuntu/Debian/Mint, Arch, Fedora...). This will typically be PPA-and-dpkg
 for Debian, but most other distros will need you to build your own version from source.
 
 * [Debian/Ubuntu installation instructions](https://tvheadend.org/projects/tvheadend/wiki/AptRepository)
@@ -19,7 +17,3 @@ version of Tvheadend - indeed, give you any version at all. Always check.
 Where a pre-built package exists, this will usually get you the last official
 stable version. However, more advanced users may be interested in running
 a development version - either a nightly build or a self-compiled version.
-
-##NOTE: TODO: STABLE VS UNSTABLE VS TESTING VS BUILDING FROM MASTER...
-
-##NOTE: TODO: NEED A VIEW ON DREAMCAT'S VERSIONS PLUS A LINK ON HOW-TO-COMPILE