NF: Sketch of a SPEC to table converter to facilitate analyses
Merge pull request #6 from yarikoptic/master

just minor things -- feel free to ignore/cherrypick etc
DOC: More notes.
Dump unfinished...
DOC: Cover letter
ENH: Start using readthedocs.
Avoid scary browser complaints
Attempt to enable travis.ci
BF: More standard target name
BF: Fix bugs discovered by travis.ci
DOC: Show build status.
BF: github doesn't allow HTML
RF+ENH: Use standard Python logging

* Log2file not yet implemented, but now easily possible.
RF+ENH: Package manager abstraction (Close gh-5)

Will help to add support for RPM systems. Also improved debian package
name resolution by converting alternative symlinks into actual paths
first.
RF: There can only be one 'provider' -- remove wrapping list (Close gh-4)

Althought the bug suggested to rename to 'providers'
BF: A bunch of forgotten things.
Regenerate demo SPEC with new code.
BF: Simplify --dbg option
ENH: Add --library to 'execute' command
BF: Fix a whole bunch of bugs, and make the cmd call fail if the test fails