Fixes support of scientific notation in modcc.

Also the corresponding unit test was rewritten in a less repetitive
manner.

modcc: support for comments starting with '?'

add unit test that shows bug in fvm

* add unit test fvm_multi.mechanism_indexes that fails to show
  bug in ticket #20
* add interface to fvm_multicell for getting list of stimuli
* add unit test that checks stimuli are correctly added to
  lowered cell

update modcc to latest modparser trunk

* update the out of date version of modparser was added to the repository
* fix some warnings about unused static functions in a modcc test header
* move modcc/src path contents to modcc, because there was little point having
  the additional sub directory.

Moved over modcc unit tests.

Can't std::sort on forward iterators.

But GNU libstc++ tries to anyway, hilarious segfaults
ensue.

* Don't try and sort a sentinel-terminated range.
* Instead provide a `strict_view` that walks a range
  (if required) and presents a range with a proper
  end iterator.
* Tests, const range (but non-const iterator) implementations.

pid doc cleanup

generated mechanism headers depend on modcc

fixed modcc->hpp dependencies

move modparser from a submodule to the repository

* only the source has been moved over and the cmake rules updated
* the tests still have to be moved

move vector library from submodul to subdirectory

Cleanup

Cleanup

Fix for warnings with latest intel compiler.

Feature/sort synapse indices